I'm doing the HEI conversion on my CJ's 258. I pulled a distributor gear from an AMC V-8 (from an '84 Waggy w/a 360) but the gear is alot taller than the GM gear. The portion with the teeth is the same, but the portion below that is taller. Is this correct, or did I get the wrong gear? My understanding was that it should be the right gear, but now I'm not so sure.