OK, so I was looking here and saw that the 90-91 b18a has 10hp less than the 92-93 ones. Is there a reason for this? Is it just the cams? It seems like, if the CR is the same, the bore and stroke are the same, then the only other thing that could change would be the cams, or maybe something about the intake manifold or something, right? Well, anyway, I would like to know what year my motor is, but I don't see the usual date stamps on the head or block. Am I just blind, or are they somewhere else on a B18A than what I think? Does anyone know the answer to this question? Pissedoffsol, do you know, since you made the chart? Thanks!