1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

429 to NP435 bell housing/clutch

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Old 03-21-2012, 10:47 PM
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429 to NP435 bell housing/clutch

I have a 67 F250 Highboy and just pulled the 360 out of it to put in a 429 to hook up to a NP435. What bell housing, clutch, and flywheel will I need? I have the clutch all the way from the petal to the z-bar. Can I use all of that? I'm kind of new to this, so I don't know what all I need. Any info would be appreciated.

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Old 03-22-2012, 03:51 AM
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hrscrazy796, The 429, 460, 351M, & 351/400 share the same bell. The 400 was used in trucks & bronks starting in 77.




John
 
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Old 03-22-2012, 07:02 AM
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So would I use the clutch and flywheel for a 400 as well? Any suggestions on which kind is best or what not to do?
 
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Old 03-22-2012, 10:30 AM
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Thumbs up 429 conversion

I converted my 68 short Ranger in 74 from a 360 to a 460 with a wide ratio toploader . Do you have the motor mounts? As far as the flywheel it will work on the 429,as it should be internally balanced.Also it should use the same pilot bushing . To connect the clutch linkage you will have to fabricate a bracket to support the clutch pivot ball for the engine side. I am the original owner of this truck and I was the first one in the New Orleans area to do this conversion. With the 2.78 first gear and 3.50 axle it proved out to be a real street sweeper at red light rallys, it topped out at 131 on I-10 @ 5500rpm. The 460 was built with 429 SCJ parts from the cam up . The truck is in the garage waiting to be restored again. Kenny Nunez
 
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Old 03-22-2012, 10:52 AM
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I don't have the motor mounts, bell housing, flywheel or anything from the 360 anymore so I need to get everything new. Jowilker said I should be able to use a bell housing for a 400 so can I use a flywheel and clutch stuff for a 400 too? And then just fab a bracket for the engine side right?

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Old 03-22-2012, 03:43 PM
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Thumbs up 429 conversion

Oh yes, Joe is right as that is the bellhousing I also used , make sure that you get the shield that goes between the engine and bellhousing to properly locate the starter.You also may need to relocate the radiator hose connections. Try to obtain a good quality motor mount from L&L in Rowlet ,Texas , they should have every thing for the conversion. They also have headers that "will fit" without having to cut up the frame for clearance. Be sure to use the original throttle bracket from the 360 intake manifold,you will have to fabricate new control rods. On my 68 I had to replace the front springs also. Good luck ,Kenny Nunez
 
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Old 03-22-2012, 03:48 PM
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Sounds like I've got my work cut out for me. Thanks
 
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Old 03-22-2012, 04:56 PM
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I've used 351M/400 bellhousings with a 435 transmission in two seperate swaps, both times I had problems with the input shaft of the trans bottoming out against the pilot bushing in the crankshaft. It seems the distance from trans mounting face to block mounting face is about a half an inch shorter on the M bellhousing than it is on a 429/460 bellhousing. If you use an automatic trans. it doesn't matter if it's from a 351M/400 or a 429/460.
I'm pretty sure you need a 360/390 flywheel to bolt on to a 429 if you don't have a 429 flywheel.
 
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Old 03-22-2012, 05:10 PM
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I'm definitely using my 435 manual transmission (I'm on a budget). So a 400 bell housing won't work? But I can use a 429 flywheel?
 
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Old 03-22-2012, 07:59 PM
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Originally Posted by hrscrazy796
I'm definitely using my 435 manual transmission (I'm on a budget). So a 400 bell housing won't work? But I can use a 429 flywheel?
I would say no to the 351M/400 bell housing and yes to the 429 flywheel.
 
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Old 03-22-2012, 08:05 PM
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So what bell housing will work to hook up to my trans?
 
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Old 03-22-2012, 08:42 PM
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Originally Posted by hrscrazy796
So what bell housing will work to hook up to my trans?
429/460, they are available, and will bolt right up with no trouble.
You could try a 351M/400 bell housing but you might need a 3/8" to 1/2" spacer in between the bell housing and the engine block. Or find a way to shorten your input shaft.
 
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Old 03-22-2012, 08:58 PM
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Sounds good. Thanks for the help.
 
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Old 03-23-2012, 10:44 AM
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429 swap

I must admit that I never have dealt with an np 35 conversion. However all 429 's that I have seen have the same counter bore in the crankshaft. Ford did change the counter bore on the 460 sometime in mid 70's. I am sure that Number Dummy help with this. Kenny Nunez
 
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Old 03-23-2012, 04:20 PM
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Originally Posted by kenny nunez
I must admit that I never have dealt with an np 35 conversion. However all 429 's that I have seen have the same counter bore in the crankshaft. Ford did change the counter bore on the 460 sometime in mid 70's. I am sure that Number Dummy help with this. Kenny Nunez
It is very possible that a newer style counter bore 460 might work with a 351M/400 bell housing, as I have never did a manual transmission swap with newer style counter bored 460, all the manual swaps I did were with 429s and older 460s and both used the same pilot bushing as a FE engine.
The problem I had was with the length of the input shaft grinding into the pilot bushing.
 
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