I know you guys have probably heard this a million times but i cant seem to find it yet. I sold my hondas and bought a 91 240sx and i know nothing about nissans. This has a SOHC in it that is knocking bad. What does it take to swap to the DOHC. Will my tranny bolt up. And does anyone know where i can get one. Id also like to know what other motors would be a good swap. Money is an object right now but not later. Im sorry guys. I don't know anyone who drives nissans. Everyone here drives a honda. One more small thing. My heads up and all the dash lights only work if i hit a hard bump. I cant find the short. Any suggestions?