How to pick a torque converter and flywheel?

ok..you do not have a flywheel..you have a flex plate.

the LA 360 and the magnum 360 are both externally balanced...

but they are balanced different...each takes a different amount of weight...the magnum uses less..

b&m at one time made a flex plate that would work...they dont any more...

i believe some people use the flex plate from a earlier magnum that has the weights on it..but requires one of the holes for converter to be elongated...