The D16A1 is DOHC, and that was used in the 1st gen Integra's. So I figured the D16A1 head should bolt on to the D15B2 block with little difficulty, because they are both of the D-series, and you would assume that they would try to keep the number of different engine blocks to a minimum to keep production costs down. And going from that, I would think the only difference is where the hole for the bolts are located, but I could be wrong. So before I buy the D16A1 head, I am going to take a head gasket from a D16A1 and see how it lines up with a D15B2 block, and then make my dicision from there.