Air in/air out. That's the key. Get ahold of Bo and ask his opinion...............
- BOPORT Racing Heads - Fremont CA
First you should go with one of his heads and cam. Next, a tube header and 3" exhaust system. LA3 computer, large VAM, etc. How many miles does the 2.3 have on it? If it's under 160k you should be OK with just a seal-n-shine. If it's over 200k you may want to think about a clean-up bore. There's no substitute for good sealing rings! Turbowise, a T3/T4 will probably get you there. You could always go with a MAF, bigger injectors, yada, yada, yada at a later date. However, what I just listed should easily meet your goals. Again, give Bo a holler.
Shelve the Volvo head idea for now. Lots of SERIOUS fabrication!