Question On Balancers And Flywheels

[fiveohlover]

I am going to order a new short block. I would like to get the 28 oz internal balance but not sure if my harmonic balancer and flywheel are set up for the 280z. does it matter? or would i have to buy new flywheel and balancer if i want a 28oz internal balance. I think i have a 50 oz balance on my current shortblock

 

[2000xp8]

The crank, balancer and flywheel have to match.
If they don't, it will be an unbalanced mess and likely self destruct.

 

[fiveohlover]

not 100% sure but i think i have a 50 oz. Is there a way to tell for sure weather its a 50oz or 28oz

 

[madspeed]

Its usually stamped into the harmonic balancer

 

[84Ttop]

If what you have now is completely stock you have 50 oz imbalance balancer and flexplate. If you buy a 28 oz imbalance motor you will need new balancer and flexplate. as others have said, this is critical and these components NEED to match.