alright my friend just bought a 90 rex today, fucking clean as hell. it has 195k miles, but the interior and the restof the car looks like it shouldnt have more that 50k on it. It was owned by and older man, garaged, and looks like it had seat covers on it for years.It is a DX model. He bought it up in Carlsbad, which is about 20 min. form san Diego, so i got to drive it home. it rides really good, just needs simple stuff, alignment, rear brakes, new shifter bushings, oil change, coolant change, etc. Other than that the car is immaculate. Well someone here in the Market forum has a Y8 for sale and my friend wants it, so i ahve to ask a stupid Q i should already know the answer to. What all do i need to do this swap? Does it need to be converted to OBD2? well i know everything about how to do the swap, just wondering about the OBD and which ECU to run. My friend will want the right ECu, no alternate VTEC engagement. And which tranny would you recommend for this. I personally like the DX gearing, but how is the Si different, more top end? shorter gears? never drove one so i dont know. any good input will help. about the OBD, i saw Calesta talking about putting a Z6 into a rex and saying switching to OBD1 isnt that hard. so is there a lot more to OBD2? or is there and easier way to do this swap and get it running good? BTW this is going to jsut be for some extra power until we get a B18c5 or an LS/VTEC built up or do you think i should forget the Y8 swap and just Junkyard turbo the DX motor for now? EDIT: I founf 2 different motors on HS here that would be good. A D15B VTEC or the Y8. the D15 would be a hell of a lot less work right? Both are about the same price and the D15 has a 6 month warranty. Here's the links: D16Y8 D15B Now which one should i get?