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Old 01-19-2008, 07:59 PM
79 towtruck 79 towtruck is offline
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Exclamation 460 flywheel

could some one set me in the right direction i have a 1979 f-350 wrecker with a four speed and a 400m i want to put in a 460 i have all the mounts exhaust,ect but what flywheel do i use,ford never made a 1978-1983 4-speed 460 help
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Old 01-20-2008, 06:14 PM
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Is the 460 you have internal or external balance ?
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Old 01-21-2008, 03:35 PM
jstephenson jstephenson is offline
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If you have an internal bal 460 centerforce makes a flywheel for that version got mine out of Jegs but it has been awhile
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Old 01-21-2008, 03:54 PM
jstephenson jstephenson is offline
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I just looked it up on centerforce.com and for internal bal engines from 69-79 they make a 0 bal flywheel brand new they want more for it than Jegs does so i would check Jegs the centerforce number is 700280 hope this helps. I just put a manual trans np435 in my 78 f-250. I have a few more things to finish putting together before i can drive it. But mine does run and does not seem to have any issues. There are a few things that i came across with the change over if you want to talk more let me know
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Old 01-21-2008, 05:05 PM
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most people use a 390 flywheel, but i havent figured out exactly what clutch to use yet. ive heard 400 12" clutch but dont know if flywheel has to be redrilled for that. wondered why not use 390 clutch. went to engine shop this morning and found 12" 390 clutch for about $275. dont remember name brand but started with p. will see if it works. one book i looked at showed same part #s for Centerforce 390 & 400 clutch, but different #s for factory clutch with same specs. hope somebody jumps on here and clears up this mess.
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Old 01-21-2008, 07:30 PM
jstephenson jstephenson is offline
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napa makes a light duty or a 12 " heavy duty for the 460 thats what i put in mine i will look up the part number in my reciepts and post it later. The problem with the other flywheels is the ring gear is not as wide. On the flywheel that i got from jegs it comes with a ring gear that is about 3\4" wide which gives more surface for the starter. I've known of people to use the other flywheel and they have problems with only catching the edge of the starter gear on the edge of the ring gear so you end up changing starters and flywheels about once a year depending on how much you drive the truck
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Old 01-21-2008, 08:18 PM
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I have done four 460 manual tranny swaps and used 360 flywheels. I have never had starter issues and always used a 460 starter. A 12" long style clutch will hit the clutch fork. I have redrilled and tapped the flywheel to use a 12" diaphram clutch. The easiest way is using the 10.5 long style clutch that the 360 uses and use a brass button clutch disc.
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Old 01-22-2008, 12:41 AM
79 towtruck 79 towtruck is offline
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I found a Ford motorsport flywheel for a 1979 and up 460 for $350.00 alittle too good for a tow truck
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Old 01-22-2008, 05:49 PM
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I tried this years ago and wound up with things binding up. I wondered if the Borg and Beck p/plate was coming in contact with the bellhousing.

I don't want to hijack 79 Towtruck's thread here but maybe someone can help me and him. Correct me if I am wrong in how I understand this.(easy on me I'm old and have forgot a lot of this stuff) Using the 69 to 79 engine you can use the 390 flywheel and re-drill it for the 12' diaphram pressure plate and use the corresponding clutch if you want to go that big, or to avoid re-drilling use the 10.5" Borg and Beck style p/plate with the button disc, use the 351M bellhousing and starter plate, a 460 starter and the only thing we haven't addressed is the pilot shaft bearing/bushing. Then if you are using the later engine you have to buy an aftermarket flywheel? Right?
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Old 01-22-2008, 09:29 PM
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Lowdog,
You are correct on the clutch set-up. I have never used a 10.5 borg and beck though.I have always used the long style. I did one 360 flywheel for a 12" diaphram. There were already untaped holes in the flywheel. they were the correct size to tap either 3/8" or 7/16" can't remember which. I had to drill the bolt holes in the pressure plate out bigger and use allen head bolts to make it work. That set up is in my highboy thats in my gallery.There are two different 351-400 bellhousings and the diaphram clutch was the only way to use the shallower one.
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Old 01-22-2008, 11:06 PM
jstephenson jstephenson is offline
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hey everybody i'm sure there is several ways to do this swap and they will all probably work and if your not doing a restore or something like it then used parts are good. i my self am trying to restore my 78 f250 with a few mods of course but i decided to use new parts as much as possible. I used the bell houseing off of a 400 the number is D7TA7505AD there is a D127 above the part number. The metal sheild between the block and bell housing needed small amount of mods so it would the flange on the crank shaft and another small mod to a piece that is extruded and seemed to me that is was hitting. the number on D7TE-AB. Like i said before i used a centerforce flywheel for an internal bal 460 the part number on it was 700280 from jegs. I have pics of that if you need them. The clutch assemble is from napa I can get the part number if you need it. I also used a new clutch fork form LCM the part number is 43-6424. Also the napa clutch comes with two pilot shaft bearings on my on my set up I had to use the smaller of the two. My truck is 2x4 and the rear section rear u-joint at the diff I had to use a differant joint. I also had to change the steering colum support in order to install the clutch pedal. If you don't have cruise control you might not need to do that. good luck on your conversion. If you have any questions, I just did mine so its fresh in my mind, just leave a post on this thread.
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Old 01-24-2008, 08:19 AM
Lowdog Lowdog is offline
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Okay, armed with this information I am going to try this again, last time was probably about fifteen years ago with negative results. Greenhighboy, I know what a diaphram pressure plate is, and I thought what you are calling "long style" is what I call Borg and Beck and that is one of the 3 lever pressure plates but now I'm not so sure. Are there 3 kinds? I guess I could go to C.A.T.T. and ask but I'll try you first.
I am going to use this setup in a wrecker also, bought from A-Lane tire shop in Conway,Mo. so ,79 Wrecker, I'm glad you made this post,let us know how your deal works out.
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Old 01-24-2008, 07:52 PM
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A Borg and Beck pressure plate has three wide fingers and a different bolt pattern than a long style. The long style is the one most commonly used on Ford trucks. I know the guys at C.A.T.T. pretty good they can probably set you up with what you need but it will be high $$$. I'm in Lebanon,if I can help you out with choosing or finding parts e-mail or Pm me.
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Old 01-24-2008, 07:52 PM
 
 
 
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