hey I spun a rod bearing in my b16 that I have in my crx right now. I have already converted the b16 to obd1, but now I am looking for a new motor with less mileage to swap in. I am thinking of either another b16a or b20b. Ive got a couple questions about it though. First, how do you convert the engine from obd2 to obd1? Second, can I swap my b16 head on, and run it reliably with no internals? I would not rev the engine over 6500, I just want it for the better head flow. Thanks in advance