How to tell flexplates apart

[340 Dart]

I have 2 stock flexplates in my garage that I have gotten mixed up.
I know one for a 73 externally balanced 340 and the other is for a 318.

How do I tell these apart?

 

[crackedback]

are they the B&M style? Sorry now see they are stock plates

If so the external balance one will have a scallop or an additional weight pad on it.

The 318 one should not have any weights scallops.

stockers generally had the weights on the convertors. The plates should be the same.

 

[340 Dart]

No, they were the stock ones Ma Mopar gave us.
Is there any difference?

 

[crackedback]

In 72 the external balance 340 cast crank engines used the same plate as a 318. The convertor was different.

 

[340 Dart]

Sweet!

Thanks!!:-D