I'm sorry, i should have specified what engine size.

The motor is a 350 4bolt @ standard bore (will be taken over size for cylinder wall cleanup)

I'm not sure what compression it will run because i was trying to choose a piston material before i chose flat, dished, or domed... I'll be running a 76cc 441 casting GM cylinder head.

I'm not exactly sure what to build. If i were building a non nitrous engine it would be another story. I don't know what cam specs to look for when using nitrous. I'm shooting for a bracket/street car if that helps. I know sometimes what your going to use it for really helps to decide what goodies to stuff into the motor.

I guess that real question i should be asking is: What is the engine requirements for a nitrous build? For example, what kind of compression is ideal to run on pumpgas/race gas, what cam specs are ideal for nitrous, ect...