FYI. Several of my friends are running Alan Pope transmissions. He's building PG's that are holding up to blower motors making 2,500+ hp.
I have a BTE, but will be sending mine to Alan to freshen it up this winter.
Check out his web site and you'll see the yellow S10 called After Hours 1300+ hp, The red Jeep, called Possessed 1300hp+. Both of these trucks are National points champs and both running his transmissions along with many other mud racers.
http://www.alanpoperacing.com/gallery.html