I am in the process of rebuilding my List #4053 Holley for my 69Z, and wanted to consider a few changes from stock (tricks of the trade) that have proven successful.
1.) Have you had success with staggering jets in a 302? I’ve read about doing this in big blocks but never in a small block. Or, would recommend staying with the std. 72 primary/76 secondary jets?
2.) With a 302 in stock configuration, what staggered jet configuration would you recommend, or that you have experimented with?
3.) What about the power valve sizes? Stay with the stock 105 on primary and 85 on the secondary?
4.) What secondary vacuum spring color do you recommend, the std. plain color spring?
5.) Do you use the check ball in the vacuum passage?
My 302 Spec's (completed by previous owner – “wanted more torque”):
>DZ block bored +60
>327 crank and rods
>flat top pistons
>stock 69Z heads
>stock Z intake and exhaust
>Pertonix Ignitor II points conversion kit & Flame-Thower II coil
>AC Delco R45S plus set at the std 0.035" gap.
Has any one else with a 302 have any experiences with the questions I have listed? Your input would be appreciated!