Alright so I just bit the bullet and ordered a level 1 and 1800-2000 stall converter form performabuilt. Should be here next week, now i just have to get off my lazy a$$ and pull the old trans.
Now knowing that I'll have a transmission capable of handling 500hp has got me looking for a 6.0l shortblock to put in next year.
1991 Silverado-L33 5.3L, 212/218 .557 .562 115+4, ASP under drive pulley,180* thermostat, 90mm truck intake w/ LS3 throttle body. Shoenfeld conversion headers and duel Flowmaster exhaust. Performabuilt LVL 1 transmission and 23-2500 stall converter.