Good idea , 340 will be plenty for the car . Might as well go Alu heads , weight saving 50lbs , can run higher compression without detonation , keep the x heads on a shelf , if you ever sell the car . If the car is built properly you could get into the 9.8 - 10,5 sec bracket , that's if you want . Don't know how street-able it will be though , 11.5 - 12 .x sec can be very street capable . Then again everybody has a different idea on what a streetable car is . Mine is a car that can be driven by anyone , can sit in traffic for hours without overheating , gets over 20 mpg highway and doesn't need adjusting every 500 miles .
Good luck , sure hope the 340 puts a smile on your face when you hammer the pedal .
You have some pics of the car ?
