Crank Shaft

I have a '65 poly 318 crank in my 340 in my drag car, they bolt right in. If you use a '65 or '66 crank the convertor register is the same as the LA's but somewere in '64 and down the convertor register is smaller so it would have to be machined out to fit a later model convertor. You will have to balance your motor, the poly has different piston/rod weights than the LA. I have been picking these old polys up for years when someone wants to throw them out because they have forged cranks.


Chuck