Yes, there are significant power gains associated with backing the stock cams up, in stock motors. Retarding cams is an 'old timers trick' to make up for a 'lack of' cam. You probably wont have the same results backing up a bigger cam in your 302.
I have heard a few different suggestions on how to find the best place to install your cam. The best way is to dyno your engine with the cam in multiple positions.
Right now we are in the process of backing the cam up even more in my friends NMRA R/S car. We are going to test it at 6 and 8. We are not sure if the results are going to be what we hope they are, but you dont know until you try.
In most stock cams, there is 1 degree of advance ground in.
Andy
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88 coupe
91 LX NMRA Pure Street 5120
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