Powershift1038 Yes there are guys running stock t-56 trans with 800 HP turbo motors. Those trans missions do last than long. If you blue print the gear clusters, and have the end play tight they will last for awhile. The gears are not made of 9130 steel and they are not straight gears in the cobras. The viper trans had better parts inside because of the Torque rating on the 488 motor. It's not about HP, It's about the torque load that the drivetrain has to with stand. Add soft tires like slicks and the breakage increases twice as fast. A trans and 2,400.00 will give you a bullet proof box with a 800-900HP and 1000ft of torque rating. Side note, couple of weeks ago at E-town, a 331 mustang with single turbo, blew apart his T-56. He was in the 700 HPrange with 10" slicks. OIled the track down and junk all over. Something to think about. Hope you guys are running safety blankets for the trans. Just a Thought.
Rick L.