Not sure yet on the bore it will be no bigger than 446. The new block is over at the machine shop as of Monday. Mach Machine does all my machine work. He builds alot of nitrous pro mod motors. The cam is is a lunati solid. Mach hooked me up with his guy Steve at Lunati who does lots of turbo grinds.
Primaries are 2" into a 3" collector. The crossover will also be 3".
Converters are tricky with turbos. If you need help with that let me know. I have guru that has special converters he does for turbo cars.