360 Flywheel and torque converter

abodyjoe said
is a 90 360 a magnum? if so i believe it is different then a LA 360. someone correct me if i'm wrong.

A 1990 would be a roller LA, not a Magnum. Same balance as earlier flat tappet LA 360s.
5.9 (360) Magnums started in 1993, 5.2 (318) Magnums started in 1992.