Took out another transmission
Apparently the stock sprag couldn’t hold up to the extra hp. The truck sat for a week while I installed the new radiator fans and when I pulled out of the barn to test them out 3rd gear immediately locked up.
Sooo...I scored a used FTI stage 3 TH400 and 2800 stall for a decent price. Well, it’s a decent price if it works. Comes with a 34 element sprag, deep aluminum pan and a few other nice upgrades. Bought it for way less than it would cost to rebuild the old one and buy a new converter. Hopefully I’ll find out tomorrow whether or not I got screwed.