I checked the float height and drop the last time that I had them apart and set them to edelbrocks recommendation. I guess that I could try lowering them a tiny bit more. The car has two 600 cfm performer series carbs. No vanke mod on the intake and I'm not sure what size jets or rods are in them. The vacuum at idle is very low, I want to say it was at 4 or 5" of vacuum at idle going off of memory. I installed the lightest springs that edelbrock makes for the metering rods. I'll try to get the lm 2 hooked up soon to get some air fuel ratios.