Thats the way to do it, I woulnd even consider running a boosted
application without a wideband and it makes any tuning 100% easier.

i've had my holley's apart before, what are the air bleeds

Air bleeds are on the top base of the carb. Jets flow fuel, air bleeds flow air. Smaller the high speed air bleed, the more fuel you flow. There are also idle air bleeds. Bleeds are crucial to carb tuning. For example, if you have to turn your idle mixture screws out like 3-4 turns to get enough fuel to idle, a larger air bleed might be needed. Same goes for high speed circuit bleeds. If you have to keep stepping up in jet sizes, and get to really large jets, and still cant get plug colors, usually going to a smaller air bleed helps richen the mixture.

If i am off on any of this, please correct me. This is just what i have picked up over the years.

Just looking thru this and it brings to mind a similiar deal I had years ago.

Had some Barry Grant stage 3 750 Holleys on a pair of mild 454's and had a similiar problem, just could not get any color on the plugs. These carbs had the best of all they do,would flow 1020 cfm and I was lost as to why they would not feed these engines. Went from jets in the high 70's into the upper 90's and no luck. When I contacted BG they claimed the carbs were not getting enough "signal" from the motors to make them work properly. Their suggestion was to return the jets to where they were when they shipped the carbs to me and install 1" 4 hole spacers under the carbs and start over. Thought they were full of chit, but did what they suggested and damned if they were not right on. Might be worth playing with some spacers while you have the engines on the dyno.

my fuel pressure was 8 pds then went to 5pounds no good . on top of the gas tank did you take that ball and spring out?????and change your gas lines to 1/2 in.