Slant six flywheel for manual trans

Charrlie_S said

Maybe. depends on the year of the engines. Up to 1967 both are the same as each other. 68 and later both are the same as each other. but different than the 67 down. Only difference is the size of the center hole

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Because the crank flange of the 68 and later is larger in diameter than those of the 67 and earlier. The flywheel bolt pattern is the same, but the center flange around which the flywheel sits is smaller on the early cranks, larger on the later. So the later flywheels have a larger center hole than the early ones.

The center hole of the early flywheel can be bored to the later size and bolted to a 68 and later motor. Using the later flywheel with an earlier crank would require a spacer to keep the flywheel centered.

My long-gone 65 Valiant had its original 170 flywheel's opening bored to the later size and I bolted it to a mid-seventies 225 slant six. Found a 64-65 slant six four speed bellhousing, hooked that up to an early 3.09 low gear four speed - fun car!