I can't seem to get my car to idle down. When I first got it running, it didn't want to stay running at all, would idle high and want to stall. Now it just wants to idle high and I didn't do anything to the carb yet. It idles at 1,400rpm in neutral, 1,100 in drive. The carburetor is a 4150 800 cfm double pumper #4780. Proform main body, no choke tower.
Specifics on the car (if it matters) are:
71 Demon may be around 2900#
340 stock stroke
275cfm iron heads
10.49:1 comp
904 trans w/TB
5500 stall
4.88 gears w/32" tires

So far I have pulled the float inspection screws, could see the fuel level.
Messing with the idle screw does nothing.
Messing with the mixture screws on the metering block does nothing. Does not have mixture screws on the rear metering block (don't know why?)
I sprayed carb cleaner around the intake, around the 1.5" spacer top and bottom, and all over the carb to check for a vacuum leak and the rpms stayed the same...right at 1,400rpm. All the vacuum ports on the carb are blocked.

I have no clue what to do here does anybody have any advice for me? I don't have much experience with Holleys, or carbs in general so I am not sure where to go from here and I am supposed to race in two days.