Okay, I tried searching for my answers but the search engine seems to not be responding the way I had wished, so I have a few bothersome questions that need answering... 1. What is the compression ratio of an H23 with H22 VTEC head (93-96 H22A1, 97-02 H22A4, H22 Type-S)? 2. Can I wire my ECU to run VTEC? If not it doesn't matter, cuz I plan on buying the P13 and harnesses if not. And no, I am definately not planning on running a V-AFC, or an RPM activator switch for that matter. Those are not options in my book. 3. Can an H23A1 header fit onto the VTEC head, or vice versa for that matter? 4. Is the dual-plane manifold that is currently on my H23 fit on the H22 head? 5. Will there be any problems between the H23 throttle body and ECU? (I assume all Ludes 92 and up have sruise but i'm not possitive) 6. Can an H23 Crankshaft drop onto the main journals of the H22 block and be bolted down fine? 7. Are the deck heights different between the H22 and H23? 8. How much harness modification is required to run a peak-and-hold injector (5th gen lude) from my OBD-1 (saturated type) harness? 9. I would like to find the 97-01 Prelude non-SH Jackson Racing supercharger, what modifications must I make to get the sucker to run good, and fit in the lude? I guess that's all for now. I prefer someone with experience in these fields instead of "he says, they said". I have had all my questions answered 30 times by people who have give me this kind of stuff, so I am depending on the H22uru's out the to help a fellow luder out, and I appreciate it!