Forgive my ignorance on Hondas, but can't you bolt up a ZC head on a D series block? If so, go that route. If not, I hear that You can take some B16 pistons out of a 1st gen Integra and put them in the D16 block. I hear that you raise the compression by alot and with a decent set of cams, you'll outrun any dohc off the line. They'll eventually catch you on top, though