360 Torque Convertor Balance?

Hello All,

I have a 74 360 out of a truck. It has no torque convertor/flexplate etc.

I understand there is a difference in balance etc. compared to other small-block engines.

I would like to be able to run any convertor from most any small block.

Isn't there a universal flexplate or something so that I can change engines between my 318 and a 360 etc. and use the same convertor etc.

Thanks as always, ROB