[Mike Taylor 3601]

I made a mistake one time I thought mine was flaring up on 3-4 shift so raised base 1 turn and it got worse, put a new set of tires on because car had became inconsistent also,tires fixed it, I would have swore it was slipping clutch on 3-4 shift when it was actaully spinning the tires and this is only 7.8 1/8 car.
I'm not saying that's what is happening just a suggestion,sometimes what you think you feel is different than you think.
As someone suggested I would try to get set w/out counterweight ,personally I'm not a big fan of counterweight when shifting w/clutch
Mike Taylor 3601