I rebuilt a 6 pack setup back in the early 90s, I bought the carbs used, cleaned them installed Holley gaskets, and jetted it according to the old Direct Connection / Mopar performance bible, Played with the secondary springs (went with the purple ones), set my Mopar Electronic distributor to 34 degrees and never looked back My car was a 4 speed, and I never even looked at the carbs for the next 9 years of driving. My car had a Hemi grind cam, and a 4 speed I will look th see if I still have the old book around for specific jet #s. I never understood people complaining about how they were hard to tune and all They are nothing more than a Holley 4 barrel cut in half with one extra set of secondaries. Don't try any "tricks", just keep it simple. Another thing I realized is a lot of the problems stem from stale gas in the outboard carbs, they do have idle circuits to move the gas through, but if the car is not a daily driver, and you don't often put your foot in it the gas (Especially today's crap) will go bad, and cause issues.
- - - Updated - - -
I found it:
I know first hand this works with A Hemi grind cam, stock manifolds, 2 1/2" exhaust and the stock air cleaner, it ran strong and never fouled plugs, bogged, or hesitated, it just pulled
- - - Updated - - -
- - - Updated - - -
I do know with the Carbs set this way if I ran 100 Octane race gas with lead, my tailpipes would be light grey, almost white after a long highway run, and I would pull 14-15 MPG on the highway running 75-80 MPH