727 question?

Hi,
I have a 1973 360 for my duster and im looking at a 727 trans with a 3500 stall converter that was on a 318. The torque converter looks like there is weights on the outside around the converter. I was just wondering if theres anyway to determine if this is for the 318 or a 360? Will i need to remove all weights and purchase the flexplate?

Any help would be great.

Thanks

Duane