There's a good wealth of information in the above posts. I'll spare repeating it all over again to you, but these guys are right in what they're telling you. I'm just now finishing up putting heads/cam/intake on my non-HO motor in my coupe. I've had some major problems getting the pulleys to fit right (crank pulley has a different offset than the HO's). Also, the fuel rails were different. The FPR was on the opposite side, so I've had to buy/fabricate new fuel rails. It's pretty much been a major PITA, but the final results should justify it all.
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1989 LX 5.0 Coupe
1992 LX 5.0 Convertible
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