Mine is a 540" B1 deal fwiw. It can run well into the 8's at 3600lbs and has never had any issues so far. As for consistency it seems prett good, nothing related to the trans anyway there. More the ability to keep the fnont end down has been the issue for me as we try to put the power in it. Still pulling fair amount of timing at the hit to tame that down, but slowing trying to ad it back. Hopefully new front shocks will be the ticket.

Need new shocks to calm the front rise and moreso the bounce when she lands. Then maybe I can put more power in it and one day maybe try something bigger than the single 4150 carb This was a low 9 teen pass here in Vegas problem is I was dialed 9.09