Hello everyone, I am currently in the process of swapping out a T5 for 1970 c4. I think I have the correct flexplate TCI part# 529610. This is the 50oz external balanced flywheel. Is this the right one for this engine? I'm sorry in advance, I did try the search tab without any luck. Anyone with experience is this dept would be greatly appreciated. My main confusion is imbalanced or external balanced? Thanks again