About to replace my torque converter, and since the transmission is out I figured I’d have it looked over and upgraded. The engine in the car was rebuilt last year. The engine: gn1 stock rebuild kit (je pistons, 4340 crank, 20 over, etc.), champion ported irons and intake, main caps, rjc plate, precision 6262 turbo. Adding edge racing torque converter 2800 stall. I’ve had the car about 6 years now and the tranny has never been touched. It shifts great, most likely has a shift kit and a good one and doesn’t leak. Now that the tranny is out I figured I’d have my transmission guy go thru it and see what is in there for sure. Trying to do a 600 hp build. What parts would I need to upgrade in the transmission to support this type of horsepower?