OK guys, I know this question is both basic and not from the normal Stove Bolt era but I know you all can help.

I just bought my 44 year dream ride, a 62 Corvette with a 327 300HP engine.

Problem is it runs very rich as evidenced by plugs being very black and car leaves black marks on drive way just below exhaust outlets. (Black is not from tires).

Engine start fine but will give a backfire when cold and you goose the throttle. Backfire goes away when warm. Black carbon on plugs can easily be chipped away with fingernail. Plugs were wet. Plugs and wires appear to be in very good condition and appear to have been recently replaced.

I put in reg gas but think I need to go to higher octane because of dieseling at shutoff. Spec compression ratio is 10.5/1

Questions:

1. Can some tell me where the mixture adjustment is located on this carburator?

2. To adjust mixture (lean-rich) do I need any special tools or gauges?

3. How do you determine a starting point, normal mixture from which to make adjustments?

4. What is a good reference manual to read up on carb adjustments.