Years ago, the 727 never held up well on a trans brake. Guys who ran weekly and made as many as 6 or more passes a night on it needed it to last on the trans brake, and the T400 does that. Now with that said, jump ahead to present day, and there are some good parts out there for the 727 these days. No trans will be maintenance free at those Hp levels, and not with the kind of torque and weight your talking about. I would still go Lenco, and seems your in the ball park...