I know there are a lot of similarities between the MG motors andbthe datsun J series. Do the rockers, pushrods, lifters, valves and valve springs interchange. Also if no one knows is there any information of vslve sizes, pushrod sizes, spring weights and bind rates and whaylt not?
According to my service manual advance starts at 450 rpm but idle is set at 600 rpm. Honestly just having a heavier spring and advancing a lite more past the where the points click would make the mid range and upper rpm's pretty decent without losing low rpm.
I can advance it myself which ive done but I want a distributor that will advance more through the rpm range. Right now im using middle grade fuel with no issue. Just judging off the advance im running with 87 octane I could have 10:1 compression at this altitude with no detonation.
I've been working on cars since I could climb my way into an engine bay and the one thing I've seen always work to find a couple of extra hp is to get maximum advance without detonation. Are there any distributors thatare interchangeable with the j13 distributor that offer more than 11°-15° of advance maybe along the lines of 20°. I do not want to be extreme with it because I like using cheap gas.