Converter for 73' 340 cast crank?

[422STROKER]

Do I need a special flexplate/converter for this setup?  The block was cast in 72(for 73) it says use for cast crank(damper). 

Thanks everyone.  My first 340

Tom

[tactransman]

Yes , the converter will have very small weights on it . I will post a pic when I get to the shop Sat. morning.

[422STROKER]

Thanks I found a B+M Flexplate 10234 it looks like I can use a zero balance converter w/this.  I have a stock 318 converter now but I would like to upgrade to an aftermarket one when I swap motors.  I have a 904 trans that will need a rebuild eventually.  Unless I can find a 727 to replace it

Tom

[tactransman]

Yup , that one will work.
Here is a pic of what a stock 727 '73 340 converter would look like.