drivability issue

you guys hit the nail on the head. the timing was way advanced. my initial was good around 12degrees, but after full advance wow, it was deep into the 40s. i removed the vacuum advance hose and thats how i am running for now, but i got some more questions for u guys. i would like to continue to run my vacuum advance as this is a pure street car, but i would like to recurve the distributer. my question is does anyone know of a good read on how to do this. i know how to adjust the spring load on the vacuum daphram but thats really all. i would like to change the centrifigul advance of the distributer so that i can run like 12 initial 34 total, maybe 36-38 w/ vacuum. any help would be appreciated. thanx