370cc is correct, though you might be able to push 10/11lbs witha fuel control unit (not sure what settings the ECU is made for). I agree with the Nismo FPR, but would also add injectors to it. Also, if unknown right now, I would try to find out exactly what settings that ECU has, and match them, unless you plan on switching the management system, then I would research injector sizing based on the HP goals you wish to obtain with that motor. The block is iron, and if you have a metal hg you should be good there, head studs will finish it off just to be safe. btw is ur 3" turbo back? do you have the elbow and dp or is it jus the exhuast? If you don't have an elbow or dp, start there.

IIRC, the hp/psi is about 7/1, but this is jus off memory.

Also, please remember the CA is an old finicky motor, double check vital engine components before putting it under un-necessary stress