dropped70

I have a 1980 302 and I am putting a new t-5 into it. I have all the parts now, but I believe I have another problem. I have a good used 50oz flywheel for the tranny and the engine has a 28oz harmonic ballancer on it. Can I change out the ballancer to a 50oz or do I have to get a 28oz flywheel. The harmonic ballancer is cheaper to get.

AdderMk2

nope, you need to get a 28oz flywheel

mjr46

nope as adder stated, balancer and flywheel need to be 28oz

dropped70

There is no way to just change out the Harmonic Ballancer to the 50oz. I already have a 50oz flywheel to make a match set.
The 28oz Flywheel is 400.00 and the 50oz ballancer is 60.00

primetime5.0

no you cant just change them out, and a 28oz flywheel is not 400$ take your 50oz flywheel down to a machine shop and tell them you need it to be a 28oz balance

67mustang302

The crankshaft is weight matched/balanced to the flywheel and balancer. A 50/50 balancer/flywheel has a crank balanced for the 50oz imbalance factor, and a 28/28 has a crank balanced for the 28oz imbalance factor. If you use a 50/50 on a 28 balanced crank, it's gonna vibrate like a mother at least, and possibly will snap the crank from the harmonics.

Gary H

Didnt the 1980's cars have the 255? Not the 302?

mjr46

TO the OP....DO NOT POST multiple threads of same subject in various sections...ie you posted this thread in general tech too....please read forum rules. thank you.