First of all I would clean the idle air bleeds on top of the carb with some carb and valve cleaner, use the small plastic tube supplied with the carb & valve-cleaner and give each 1 a quick shot, then put a vacuum gauge on it to make sure the needle is very steady and not fluctuating or bouncing & then set the idle mixture screws with the gauge to obtain the highest idle vacuum .
Also 36 * total timing is not a lot of total timing in a 302, We regularly use 42-45 total with vac pull.
How much initial at idle does it have, and how much total mechanical timing in distributor? What pull & how much in pull? DZ302 seems to like at least 10-12 initial , but this depends on distributor mechanical advance. I’m sure Jerry gave you a sheet?
