Back in the 70s and 80s my buddy would advance the cam gear 1 tooth on stock non hp engines. Really seemed to perk them up. I’m thinking it was 8* or more. I’m sure someone will do the math. Kim
the guy dave that helpped me build my 360 did the same thing. infact he had just rebuilt a box stock low mileage smog era 440 and put the cam in 1 tooth advanced.. he says its about 10 degreese.. that motor ran awesome.