Though this is coming from an F-body guy, I am putting a (Mike Kurtz) built 200-4r in my Z28. The OD was a must for me. Also, my MTI 422 on the spray will be making around 850 or so flywheel torque - Mike assured my that the built tranny would be able to take this and more . From what I understand, low 9-sec GNs are living a long time on these built trannies (as long as they are built right), and everyone kind of knows that GNs are not exactly lightweight cars . . .
Buick guys - correct me if I am wrong on what I am posting above, but I believe that to be correct.