As long as the motor is 2005.5 and up you are safe to run 12-15psi with a good tune.View attachment 165097 Its cheaper to take the na motor and change the pistons and exhaust valves.
I recently purchased a 182 Barra for no particular reason and no vehicle to put it into, but it was actually quite inexpensive. So I bought it. Now I have a Lotus Seven replica, a Triumph GT6 and the option to get a very nice running MG Midget. I don't usually gravitate towards imported cars, but I recently bought an unfinished 5.0 Spitfire and now it is finished except getting the brakes on the 9 inch to play with the rest of the system. At this point I found out how inexpensive vintage British sports cars are and bought a raft of them. It appears any of these might fit the Barra engine into it other than height but I won't mind being able to see the top cover.
To the point, you mentioned changing pistons and exhaust valves, is that critical even if I set it up for mild boost pressures, like 7 to 10 PSI?
Assuming I even bother to turbo it, these cars are between 1100 to 2000 lbs fully dressed in stock trim.