I'm trying to choose a distributor to use on my 302. The stock one is a Delco 1112386, which has no vacuum advance. For street use I think I'd like to have one with vacuum advance, but I'm having trouble figuring out the best choice.
The specs of interest appear to be Cam Angle(dwell?), the degrees of max. centrifugal advance and the RPM at which it occurs, the vacuum reading at which vacuum advance starts, the vacuum reading at max advance and the degrees of maximum advance.
For traditional single-point distributors Cam Angle appears to be available in three ranges: 28 - 35 degrees, 31 - 37 degrees and 38 - 45 degrees. Max centrifugal advance ranges from 12 degrees @ 1000 rpm to 17 @ 1800 rpm or 18 @ 1700 rpm. Beginning of vacuum advance ranges from 4-6" to 7-8.5". Full advance vacuum ranges from 7.5" to 18.5. Max. advance seem to be limited to 7 and 10 degrees.
Anyone have any advice in this area, and if possible, the reasons for the choice?
Thanks
