Do I need a different flexplate?

[stephen4785]

My friend gave me his crank out of his 5.0 84 1/2 Gt 350.I put the stock flexplate on the motor that came off of the old motor.Do I need to get the flexplate from a 84?Its a 68 block.The crank is all i used.

 

[Ronstang]

If you used the 68 flexplate then it is the wrong imbalance. The 84 engine uses a 50 oz imbalance and the early engines used ~28 oz. You need to get the one that macthes the crank...so you need a 50 oz imbalance for a small bellhousing (157 tooth) C-4 as I am assuming you have an automatic.

 

[stephen4785]

yeah its a C4.Where can i get that flexplate?And about how much do they cost?

 

[Ronstang]

http://store.summitracing.com/defau...plate&Ntk=KeywordSearch&N=110&PartSearchFlag=

Quick search at Summit yielded this but you should call them as they might have a house brand for a lot less $$$>

 

[BobV]

The Cheaper Alternative

 

[Ronstang]

I knew there was a cheaper alternative but I couldn't find it quickly....thanks Bob.