I just put a transbrake in the 727 I have in my Duster. The car weighs about 3300 lbs. at the starting line. It runs mid-10's. It's a 500-inch big-block making about 600 hp. 4.10 gears, 4000 converter flash.

I haven't taken the car out yet, and I read some info about stock aluminum planetaries being questionable with a brake. I wouldn't want to take the car to the track and strip out the planetary splines. The rest of the trans has been well upgraded with a billet steel front drum and 16-element sprag. Is the risk I'm taking worth the cost and trouble of putting in a steel planetary at this point?