also your 555 cc injectors and single fuel pump will be the limiting factor. The stock block should be fine. I'm hard core because I am older, wiser, car is paid off and make more money :) Maybe you can come to my house Saturday after noon. I am doing the "Putin the engine back in the car" thing
Arizona'a most powerful 600HP 15 second Z More powerful than a stock TT , slower than an NA
Dynoed 515 rwhp and 420 ft.lbs @ 16psi 89 degrees. 533 rwhp and 450 ft. lbs @19 psi and slipping clutch and heat soaked motor , 85 degrees.