i just got a flywheel for my 78 f250 and it included the pressure plate/ clutch assembly. the assembly that my uncle origionally had on there was off of a 351m, it has many tabs and a smaller clutch disc. but because of the different flywheel bolts i can only run the 400 pressure plate/ clutch. will i have to change out the throwout fork and bearing to fit the new assembly, and if so do you know the part numbers by any chance? thank you.

 

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Ive been where your going, and although I cant give you part numbers, one thing for sure is the pressure plate, flywheel, throwout bearing,clutch lever and bellhousing must all be an engineering match-else you get into all kind of sticky problems and then you end up throwing good money after bad. A good site for parts research is the rockauto site and another good site for clutch information is Novak clutch. The 400 cube engine should take a 12 inch diaphragm pressure plate, but if there is a 3 finger type pressure plate on it now then that bellhousing lever setup will not work. The diaphragm and the 3 finger are different thicknesses. The correct throwout bearing for a 78 with a 400 is a N1439SA ( I think ) for a 12 inch diaphragm plate. The clutch lever should be stock Ford. A key issue is in the new kit did you get a diaphragm pressure plate or a 3 finger?

 

i got the three finger plate. im thinking it may just be easier to find a 351 flywheel. does anyone need a 400 flywheel and pressure plate?