I have 2 87 5.0 truck moters 1 is already setup to v belt the other im building I also have a 76 mustang 2 c4 and my original 3sp manual out of my 75 grabber was told neither moter will work with my stock part from either tranny
You will need a flexplate or flywheel with the newer 50oz. balance weight as opposed to the older 28oz. of the 70's.
... The larger 157 & 164 tooth C4 flexplates are readily available in 50oz but I dunno about for the M-II trans... I believe that one is like 148 tooth... Also there is no boss on lower left of 5.0 engine for clutch or column automatic linkage... If you have a roller cam then you need a steel dist gear as the std cams use a iron gear... Stock cams in '87 truck motors are iron though, block is roller cam compatible...