Diego Ted,
Sorry I didn't see your post earlier. If you clicked on the red link below my name and took a look at the pictures, that's what I did to solve the problem. Two 1/2" thick gaskets does the trick. I installed longer studs to run them. I have been running that set up for about two years now. No problem with the idle ever or on restarts even on 100 degree days.
I run the R7585 1920 Holley Economaster.
EconoMaster 1920 Holley R7585 modifications:
This set up really wakes up the engine!
Reference: .078 = 5/64th
Idle mixture hole .080
Idle air bleed #65 drill, .035
Squirter hole #65 drill, .035
Idle @ 4 turns with #61-2 to #64 jet
The pump shot is very strong, enough to break the rear loose with a 2.76 posi.
For good mileage:
2009 changed back to nearly plugged idle air inlet by peening hole with round tip on scribe. The hole is a very small idle bleed inlet @ .005. with a #57 jet and idle mixture set @ 1 7/8 turns.
Glad you figured it out and that it's working for you!
