Thread: Assembling my 383

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The bolt pattern is the same, so they will (regrettably) interchange. But, very easy to tell the difference. The 400 flywheel has a counterweight attached to it, the 350 has none. The balancer has a big gouge taken out of it where the 350 is perfectly round.

Thanks mate, what I was actually after is there any way of identifying from the crank only whether it needs a 400 harmonic and flexplate or a 350 harmonic and flexplate. Its a scat crank and unfortunatley scat makes the 383 cranks for both the 350 and 400 harmonics. I purchased the kit online of ebay, from someone who had given up on the rebuild and he didint even know there was a difference