Anybody in Colorado with an Fb 12A running a Racing Beat Holley 465 ,exhaust and intake?If so what primary jets are you using.I'm running .500 I think.My car is running a little rich but performs pretty well.I live at 6200 ft. and am trying to find a happy medium for the various elevations.

 

I have the RB 12a streetport Holley 465 setup. I also have a RB header with no cat. right now I'm using the jets from RB that came with the carb I don't know the size. My car seems to be running good although I have yet to get a wideband.

I'm at about 6,500 ft or so. I'd like to see what you come up with as well.

 

I think I was way off on the size.They are actually .050.The carb came with .047.I seem to have better ability to climb hills around town (craig)in 4th& 5fth with the .050.But they may be to much for Rabbit Ears pass.