I'm about in the same position as you. I swapped in an F22B DOHC last year, and its decent, especially with the bolt-ons I have for it. Now I'm thinking H22 head swap with a mild turbo, 6-8 lbs of boost. I got a complete H22 for $92 because it needed a ring job, the head is great though. I'm thinking of dropping it right on my F22B short block and seeing what happens. I have a few F22's sitting around, I've been thinking that maybe I should bore one of those, get some forged pistons, then turn the boost up even more. Revs can't be too high though, given the F22/H23 tendency to spin rod bearing #3. I think 6500-7000 should be reasonable enough. With enough boost, it shouldn't have to rev too high.