What would you guys recommend for a currently NA auto 1990 240. I got a good deal on the 531 and plan on taking it to the machine shop. I might switch out the aw70 later on for a 350z six speed(waiting to hear some feedback) but as for now I'm not doing anything to the transmission. What do you recommend for the head gasket and final CC for the combustion chamber? Cam for now? I was thinking an A cam since it is still an Auto. I'm not looking for a race car, just a little more pep. I've read a lot about people increasing the valve size for the exhaust but that is more for turbo cars and I'm not quite ready for that yet, I want to find a big rod squirter block first.