I want to check the tune on my stock 70 340-6 automatic. Any good references out there? I have a shop manual but it doesn't have any specifics on the 340-6. Right now it runs ok but the idle seems to high to me and there is a little hesitation from light to mid throttle. I'm running 93 octane and everything is stock. I need to know what timing, idle, manifold vacuum at idle, and anything else that would help so I can get it to run as good as possible.