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clutch for 429 swap

hey guys i been swapping in a 429 into my 77 f150 4x4 but the clutch is holding me up. i got a 390 flywheel for my 69-70 429, but i cant find a diaphram clutch that will work. i think the flywheel has a 12" long style bolt pattern but i'm unsure. i've tried a 77 f150 460 12" clutch and a 74 390 11" clutch that won't bolt up.

i took a picture and some measurements. hopfull someone can shead some light on my delema.
 

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Fellro

Moderator
Staff member
It looks like the bolt pattern between the diaphragm and the lever type pressure plate is NOT common. You appear to have the lever type flywheel. However, you might be able to take it to a machine shop and have it drilled fro the diaphragm type. Looks like you should resurface it anyway before install.
 

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