Hi twday, i actually have the regulator you mentioned and i had it set originally to 4lbs and it's now at 5lbs with the holley 750cfm double pump. using holley's sight plugs you can see the fuel is roughly almost a quarter of the way up the plug. still got a few things to do like change plugs...

Jasperrc, there isn't any smog, egr, or emissions devices of any kind, the motor is as basic as you can get. Going to do a little timing advancing on it and lower the floats on the carb with a good dose of cross the fingers lol.

I did. I started with the factory settings on a warmed up engine, timing is at an intial 12degrees, vacuum guage hooked up and slowly turned mixture screws inwards to get the highest reading on vac guage which right now is a steady 29.5 inches of vacuum.

Yep, brand new from holley. primary jet size is 72, 6.5 power valve.

Hi Folks, for many years i have been a diehard chevy fan, but after many years of riding and driving my cousins 79 Dentside I am a convert and now own a 78 SWB 4x4 dentside. And there inlies my issue, it had a broke down 400m in it, it now has a 1990 460ci with less then 80,000 miles on it...