Clutch Question

[McGuyver]

I have a 78 f250 . 351 m . I rebuilt a 77 351 m & put my 78 flywheel & clutch on it. the clutch lasted a few years (7 ) then went out. I ordered a new flywheel from LMC but they only carry 77 flywheel for 351m. 77& 78 flywheels and 77 & 78 clutch kits are different. Whats the difference??? I figure if I use the 77 flywheel & 77 clutch kit eveything shoud be ok???

 

[Txquadhunter]

The few I've seen side-by-side on the 351M/400s is they use the same clutch and flywheel setup. Unless they thinking the FE to the M block.