Now the question is do I repair this and keep going with the 4 speed, or do I go to an automatic that can handle the power? ( for reference i stripped the third gear cluster on the street earlier this year. )

This is a street car, but 12.00s doesnt do it for me, and i want to go quicker. I can add nitrous to the motor, but the 4 speed probably wont live for long behind that.

A 727 with a trans brake, and a big stall with a bunch of goodies in the trans would also help the car be quicker. I could also sell the a body 18 spline for some $$$ to offset part of the cost for the new auto.