jveik

i noticed it said you need a 400 harmonic balancer, but as for the flexplate, can i just throw the one from my previous motor (350) on there or do i have to go find one on a 400 and yank it?

silicon212

You HAVE to use the 400 one - these motors are externally balanced, unlike the 350 which is internally balanced.

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1988 9C1 - Modified LM1 @ 275HP/350TQ - TH700R4 - 3.08 8.5" Disc Rear - see it at http://www.silicon212.org/9c1!

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jveik

can i buy a cheap aftermarket one or am i gonna have to go hunting?

Rebel Racing 3

You do not have to use a 400 harmonic balancer i use a 350 on mine and we had it balanced at the rear of the engine (extra metal added to the end of the crank shaft)