if you're gonna run the stock redline, no head upgrades are needed. bolt-on, find yourself the D16Y8 ECU, and you're set. Of course if you choose a high performance cam, then follow the recommendations of that cam.

If you wanna get some bigger power, run D16A6 (88-91 CRX Si) pistons in that D16Y7 block. That'll yield you roughly 10.5:1 compression. Then you got the option of overbore, balancing, etc etc. If you're willing to put in some serious tuning time, you can even run D16A1 (86-89 integra) pistons, that'll get you 11:1 compression, but it's gonna require more anti-detonation work.