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asigalet
04-18-2006, 08:08 PM
I'm in the process of getting ready to put a 429 in my 78 f-250 4 speed 4x4. Currently has a 351M boat anchor. Has anyone else here done this swap? Did you have any problems? I have picked up a rear sump pan, and am in the process or ordering the proper motor mounts. I have heard that there may be clearance issues on the bellhousing, and that I may have to make a bellhousing spacer? Let me know if ya got any info, any input is greatly appreciated!

eastvanmikee
04-19-2006, 09:42 PM
429 will not bolt right up to your 4 spd...if you have a custom setup made and break it , its gonna cost huge all over again to fix it..Go with a c6 (cheap and plentifull) and be done with it, they make huge power even at low rpms so you will probably never miss the 4 spd and youll have a free hand to sip with when wheeling

429orangepeel
04-20-2006, 07:13 PM
motor will bolt to 4spd.you need to have a pilot bushing made and shorten the troughout bearing sleeve so pressure plate will release.autos are for people who havent learned how to wheel yet!

Nutbar
04-20-2006, 07:20 PM
motor will bolt to 4spd.you need to have a pilot bushing made and shorten the troughout bearing sleeve so pressure plate will release.autos are for people who havent learned how to wheel yet!

[iagree]

Randy knows what he's talkin about with these old fords and he has done this swap as well.

78bronco
04-20-2006, 08:55 PM
I have done a close swap but I have a C6 and I made adapters to use the 400M mounts so you dont have to buy those L&L motor mounts

asigalet
04-20-2006, 08:56 PM
I love my 4 speed. Can't wait to get this motor in, hopefully it goes all smooth. Ya right it never happens that way!

429orangepeel
04-21-2006, 01:53 PM
advice:use a torque strap from motor to frame on driver side so to save motor mount from tearing.this also gives you better clutch control.

eastvanmikee
04-22-2006, 06:02 PM
[iagree]

Randy knows what he's talkin about with these old fords and he has done this swap as well.

All I was getting at was that its cheaper and usually quicker to fix if you can use wrecker/ factory parts. With a 429 hes probably gonna be breaking sh#t..

asigalet
04-22-2006, 10:08 PM
429/460 its all the same shit anyway, they all are the same to swap over. I do know that the np 435 will take the power the 429 puts out, just looking for anyone else who has done this swap. It is pretty common since Ford didn't put 4 speeds in the 73-79 pick ups as a standard option. If you have a 460 in a 73-79 pick up It is most likely (99%) a c6 auto. Thanks for the input 429orangepeel!

broncorandy
04-23-2006, 12:47 PM
I did the same swap in my 68 I went from a 360 to a 429. I used a dodge motor mount that has studs on both sides and made a flat plate to bolt to the motor and then the mounts. I had a 4 speed and used a bellhousing that came from a 460 / 4 speed not sure the year but they are around just hard to find. And yes u do need to use a strap I used a chunk of chain I broke a 3/8 chain once from the torque.

429orangepeel
04-24-2006, 07:15 PM
My bronc has been ridden hard and put away wet for 7 years and 435 has done no bitchin.429cj will only make maybe 375HP in stock dress and it would need to be 1968 1/2 year motor only.Be prepared to go threw clutch every 1 1/2 years,But u need a week link somewhere.

asigalet
04-24-2006, 09:14 PM
Thanks man, what clutch did you use? I am thinking of using a centerforce dual friction to try to get some more longevity out of it? Not sure about it though.

429orangepeel
04-25-2006, 08:11 PM
I use a lordco special! There cheap and work nice the trail for slow engadgement. Centerforce is a much better kit, but hates slow clutch engadgement. It will handle high RPM side steps on the cluch much better.$$$$$$$$$$ however you pay for it.This is only my opion though.

78f150
04-25-2006, 08:26 PM
hey 429orangepeel what is your powersteering bracket off of and what rad did you use.

boyzen
04-25-2006, 09:12 PM
Thanks man, what clutch did you use? I am thinking of using a centerforce dual friction to try to get some more longevity out of it? Not sure about it though.
If you are useing it in the mud don't use center force or any clutch with the little fingers, cause they fuck up fast in the mud .get one with the 3 lever design seem to be better for what I have used an seen. I have 5 years on my clutch but iots not a daily driver but it might get another 6 months maybe.
I run 44 and almost 450 hp 428 engine

429orangepeel
04-26-2006, 05:21 PM
I used a 1980's high presure pump.Took the 1979 bracket with the adjustable jack bolt for belt tension and modified to fit the 429 block.Rad is a stock 3 core pots and a aftermarket core.I eleminated mech. fan and installed custom made alum. schrouwd and electric Iroc Z28 fan.Size 16" x 5 blade.
Fan runs thermo control,turns on @205dgr. and off @ 175dgr. Water thermo is 160dgr.

asigalet
04-27-2006, 02:22 PM
What is the best flywheel to use. I have a 390 internal balance already which is supposed to work???, or is it better to use a newer 460 flywheel and shave the weights off? What one did you guys use?

429orangepeel
04-28-2006, 06:54 PM
I used a 390 flywheel.

jeepingpw
04-29-2006, 07:56 AM
I have done about 5 of these with 4 speeds & a couple with autos.

You can use a 390 fly wheel but the tooth count on the ring gear is out by 3 teeth compared to the 351M. It works but is a little noisy.

Be carful of the pressure plate & starter you use. Ford made 5 different depths of each. We found out the hard way when on one swap the pressure plate would bind on the bell housing as it was too thick. Went down to the Napa warehouse & measured all applications of different years on the starter shaft lenghts, pressure plate depths & the ring gear tooth count.

On Ford small blocks, there are also 3 different depth bell housings.

Use the stock 351M motor mnts. Bolt them to the tower, insert a 3/8" plate between the engine & mnt & mark the holes. I have a template some where, I'll try to find it today.

I have never had any problems with pilot bushings, just get one with the 4 speeds inner dia, & the 429's crank shaft outer dia.

While engine & trans are out, put it together with & with out the clutch to make sure of clearances, trans shaft fit & starter fit.

On a buddies truck we put a 429 Thunder Jet in it, but found that it didn't have the bottom end as a 460, but would rev like crazy.

On one '79 we used a ZF 5 speed & hyd clutch/ NP205. Had to make a new trany hump & x-member but it worked great.

You could also use the bell housing/hyd clutch from a '85ish truck with a 460, but NOT the flywheel.
If I can ever get a good deal on a ZF, I will give my '85 BW 4 speed & bell housing away.