Autocross and a 904 transmission

He's probably making 380-400 lbs-ft at 3000 rpm, lets say 390 lbs-ft, and probably peaks 450 lbs-ft probably around 4000 rpms, 390 x 57% = 222 hp & 450 x 76% = 342 hp.

So probably makes around 222 hp @ 3,000 rpm and 342 hp @ 4,000.

The kind of horsepower you'll have to play with even if 370 lbs-ft @ 2,500 rpm would equal 176 hp.

So obviously deeper gear more hp to the ground.