47 degrees initial time? help!!!

crackedback said

You need to change the mechanical advance in the distributor, NOT back down the initial timing so the total is still in bounds.

See where the car start with difficulty, if that's at 20+ so be it. Set the initial timing there or close and tailor mechanical to hit your total, NOT the other way around!

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^^Right on as always^^

MoparorNokar-I had that cam in a 360 and it idled at 700 in drive. I had the distributor modified to only have 12 degrees of advance so I set the timing at 22 with 34 total. When you don't have enough initial timing (like yours) the idle will be nastier and have to be turned up higher. Do as Rob says and it'll idle better (a little smoother and lot lower rpm) and be snappier when you gas it and make sure you hook the vac advance up to the ported port. If you hook it up to a straight vac port it'll be cantankerous and drop a lot more rpm when you drop it in gear. A/J also has good points abotu carb tuning

BTW: do you know what power valve your carb has in it? You probably need a 5.5 with that cam. The carb (if it's a Holley) probably came with a 6.5 which will open a little to early