Radials don't play nice with stick cars! Got to go Bias Ply.

Just to state the obvious,....Don't build a 18K power plant / $1K clutch infront of a $300 transmission.

You need way more trans. Sell the clutch (23 spline) and get the right setup to hold up to your power / chassis.

I've raced with 550 hp and 23 spline, but now I've gone up to 18 spline. If I had 600 hp or more, I'd be looking at the $2k to $4k transmissions out there.