5 speed manual reccommendations

I have an 1987 IROC 5 speed that I have installed a healthy 383 into, should be about 450 hp. It runs well, but I am concerned that the stock 5 speed may not last long. I don't plan on drag racing the car or installing sticky tires, but I do occasionally light them up from a standstill. Does anyone have any experience with any of the aftermarket 5 speeds that would be up to handling the extra torque? I know the rear will probably be next, but I have moser axles, c-clip eliminators and an eaton posi with 4.10 gears so I have beefed that a little.

yea, that stock 5-speed won't last long. you could do a t-56 swap. with those rear end upgrades, I think it should hold up fine.