Sounds like you are talking about the TV cable from the trans to the throttle plate. It also sounds like you are now running a 350 engine with a 350 transmission now. If all this is correct, then you need to get a TV cable adjustment procedure. Full open throttle and fully pulled cable should match. Release and the carb will return further than the TV cable. I am not sure, but there is nothing inside the transmission that you can bend by over pulling the cable. Might have bent the bracket at the carb.