SFI damper vs Flexplate

Since 360's are not balanced,i bought a Powerforce Plus SFI Damper a few yrs. back. You are able to bolt in weights in the rear of the damper per application or run it without weights per application. I also bought a B/M flexplate (the one that looks like it has a bite taken out of it). Can i use these both together,or is it one or the other. I did bolt in weights per my application. I don't know if i can use that flexplate,or if i need to go to the square flexplate with a weighted converter and leave the damper weighted. Thanks for any or all replies. I'm trying to get my ducks in a row so when spring comes,i can get this car on the road.
Author: dillray1