460 Swap Trouble "HELP"
Junior User
Joined: Mar 2005
Posts: 79
Likes: 0
From: Belleville, MI
I reused the 360 flywheel for my conversion. I'm pretty sure that a 390 flywheel is the same, at least if it's from a pickup. It has an 11" clutch. I used a 400 bellhousing from a 78 pickup. I was forced to modify the input shaft of my trans, as my crankshaft did not have the smaller inner ID for the adapter pilot bushing.
I was not able to use the original 3 finger Long type pressure plate in my set up. It made contact. With the clutch fork I think... It's been awhile. I switched to a diaphragm style replacement pressure plate and have had no problems.
I was not able to use the original 3 finger Long type pressure plate in my set up. It made contact. With the clutch fork I think... It's been awhile. I switched to a diaphragm style replacement pressure plate and have had no problems.
New User
Joined: Jan 2011
Posts: 14
Likes: 0
460 swap
This is what I am trying now. There was not a 390 flywheel in the valley not to mention the one I had was not a zero ballance but it was inbitween zero and one with a balance waight. I spent today cutting a spacer to go between the bell housing and the block. I bought a standard 460 flywheel and balanced it the same as the old one. I used a standard 12" diafram type that bolted to a six hole flywheel. I will be putting it togehter tomarrow. I think the spacer will fix the clearance problem from the transmition and the clutch plate. If this works the conversion will work with all stock parts. just add a spacer.
Mountain Pass
Joined: Jul 2011
Posts: 117
Likes: 1
From: Thornton, WV
I think Pintoches has a good idea. The borg/beck style (3 finger) clutch can hit the 351/400M bell. I have done this swap putting an early 460 in where a 400M resided in my '79. I used the 400 bell, the correct balance 460 flywheel and diaphragm clutch. Everything worked with the exception of the clutch would not release initially and it was due to a manufacturer error in boxing the clutch. They had the wrong disk boxed in the clutch kit (it was too thick). I suspect it was a disk for a borg/beck set up in with a diaphragm pressure plate. So don't rule out the possiblity of any of your new parts being part of the issue too. I will say this swap is worth the effort. My '79 was a horse when it came to hauling/pulling and the 460 was just freshened up with a stock rebuild and mild towing/RV grind cam.
Thread Starter
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New User
Joined: Sep 2011
Posts: 11
Likes: 0
Ok everybody.... I finally got to go over and look further into this thing... First I want to say thank you for everyones advise it has been extremely helpful!
I got a hold of a tiny fiberoptic camera and explored the bell.... Cant see anything hitting although there were spots I could not see....
Used the camera in the spark plug holes and low and behold found the #1 cylinder rusty.... Darn it! Anyway wont know the extent of damage until I get it back out and pull the heads... I am praying I can just hone the cylinder and re-ring them all while I have it appart.
Can anyone tell me exactly what I need to know so I can get the right rings for it?
All of the other cylinders look great and can still see the cross hatching..... Anyway since I am not a mechanic and this will be my first attempt at honing and replacing rings any advise will be appreciated...
Once I get the motor back out and pull it all apart I will post my findings....
I hope everyone has a blessed week...
I got a hold of a tiny fiberoptic camera and explored the bell.... Cant see anything hitting although there were spots I could not see....
Used the camera in the spark plug holes and low and behold found the #1 cylinder rusty.... Darn it! Anyway wont know the extent of damage until I get it back out and pull the heads... I am praying I can just hone the cylinder and re-ring them all while I have it appart.
Can anyone tell me exactly what I need to know so I can get the right rings for it?
All of the other cylinders look great and can still see the cross hatching..... Anyway since I am not a mechanic and this will be my first attempt at honing and replacing rings any advise will be appreciated...
Once I get the motor back out and pull it all apart I will post my findings....
I hope everyone has a blessed week...
Thread Starter
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New User
Joined: Sep 2011
Posts: 11
Likes: 0
Well guys pulled the motor back out that was "suposed to be a running ready to go motor" Took off the intake and my heart dropped to the floor with bad rust in #1 & #5 head holes... proceded to remove the heads and #1 cylinder was completly full of rust which seized it as soon as it started to turn....... The guy I bought the motor from pretty much got me... I met him through a friend so maybe he will buy it back/give me my money back (Yeah Right) say a prayer for me!!!
Now here is the big question and I really need exact answers not guess's or maybe's!
I found a running for sure.... complete 460 out of an 87 RV... Its priced right and only has 40K on it ....headers are on it etc....
Casting# D9TE-AB "Externally Balanced" It took me forever to figure out waht I needed for internal now I need to know "Exactly" what flywheel I can use and whether or not I can use my 351m 11" cltch and preasure plate or not.... If not what budget minded clutch will work?
Remember guys it is going into a 78 4x4 f150 ..... I hate have to buy the L&L swap kit for this as they already (&@^%*! me off) over a simple pilot bushing.
So some options you guys know for sure that will work would be greatly appreciated!!!!
Have a blessed week!
Rick
Now here is the big question and I really need exact answers not guess's or maybe's!
I found a running for sure.... complete 460 out of an 87 RV... Its priced right and only has 40K on it ....headers are on it etc....
Casting# D9TE-AB "Externally Balanced" It took me forever to figure out waht I needed for internal now I need to know "Exactly" what flywheel I can use and whether or not I can use my 351m 11" cltch and preasure plate or not.... If not what budget minded clutch will work?
Remember guys it is going into a 78 4x4 f150 ..... I hate have to buy the L&L swap kit for this as they already (&@^%*! me off) over a simple pilot bushing.
So some options you guys know for sure that will work would be greatly appreciated!!!!
Have a blessed week!
Rick
Thread Starter
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New User
Joined: Sep 2011
Posts: 11
Likes: 0
Its pretty bad........ considering my limited skills..... I tried to smack the piston out with no success! on top of that the heads were just as bad....
I wish I could figure out how to put pics on here LOL
I wish I could figure out how to put pics on here LOL
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Lead Driver
Joined: Mar 2004
Posts: 8,924
Likes: 153
I'd just buy a new one. Summit has new ext bal flywheels cheap, at least they did when I was switching mine. $100 as I remember.They are on ebay too. No one makes a cast int bal one thats why they cost $300 and up but the ext bal are available in cast so they can be sold cheap.
Mountain Pass
Joined: Jul 2011
Posts: 117
Likes: 1
From: Thornton, WV
Check out a thread on 400-460 swap by NBC Steve. It is pretty recent and I posted some details of my '79 460 swap using 1965 352 V8 mounts. I had pictures of that swap when it was done but it was so long ago they were on floppy disk and our new PC has no provision for them, so they got tossed a couple years ago...sorry.
New User
Joined: Jan 2011
Posts: 14
Likes: 0
460 swap
I was waiting to post my results here until we were finished. I made a spacer that went between the bell housing and the block then we used all off the shelf parts. We used the standard 460 flywheel with a 12" inch diaphragm clutch (the 11 inch clutch would have worked just as well). <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com
fficeffice" /><o
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With mine the problem was the snout of the transmition that the throughout baring rides back and forth on contacted the clutch disk, if I would have machined 1/8th inch off a 360 or 390 flywheel that would have solved my problem. However, I wanted to make the least modifications I could. <o></o>
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In my opinion, from what I did, the bell housing spacer is the way to go. It solved all my problems. I even cut extra spacers thinking someone might want one. The only hard part was removing the locating pins and replacing them with longer ones. <o></o>
<o> </o>
I know there are no absolutes, although, this worked out well with my setup.<o></o>
fficeffice" /><o></o><o
> </o>With mine the problem was the snout of the transmition that the throughout baring rides back and forth on contacted the clutch disk, if I would have machined 1/8th inch off a 360 or 390 flywheel that would have solved my problem. However, I wanted to make the least modifications I could. <o
></o><o
> </o>In my opinion, from what I did, the bell housing spacer is the way to go. It solved all my problems. I even cut extra spacers thinking someone might want one. The only hard part was removing the locating pins and replacing them with longer ones. <o
></o><o
> </o>I know there are no absolutes, although, this worked out well with my setup.<o
></o>
New User
Joined: Jan 2011
Posts: 14
Likes: 0
flywheel
Your cast number in your post comes from a 1979 truck externally balanced. But weather you use the new 390 flywheel and cut it down or use the 460 and use the spacer both will probably need to be externally balanced. <?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o>
<o></o>
The pressure plate should work provided they both have the triangle six hole pattern and the holes line up. Just take the pair you plan to use into a local clutch shop and they most likely can take one look at them and tell you whether or not they will work. Additionally they should be able to tell you what parts you need to change to make it work. Any flywheel you use will need to match the balance the original one on the engine. A good machine shop can tell you if the balance matches and correct any differences.<o></o>
fficeffice" /><o></o><o
></o>The pressure plate should work provided they both have the triangle six hole pattern and the holes line up. Just take the pair you plan to use into a local clutch shop and they most likely can take one look at them and tell you whether or not they will work. Additionally they should be able to tell you what parts you need to change to make it work. Any flywheel you use will need to match the balance the original one on the engine. A good machine shop can tell you if the balance matches and correct any differences.<o
></o>