sid m8 when i saw your engine on the dyno making 318bhp at 18psi it made me Realize what is Achievable from a zvh with the right Components. also i did'nt want to Ditch the cylinder head after spending so much money on it. you've been looking at going bigger on the turbo front, its a choice between a gt series turbo or a t38. personally i would go down the gt series turbo route due to the low lag and the high volume of air they can push.
then what about a small shot of nos to get the turbo spooling up Instantaneously between gear changes

car going to take me a bit of getting use to, at times its down right dangerous