Originally posted by attmchappo
well the holleys that weird 4011 spread bore carb that only has one big tube in the front. the guy who i bought it off of had it on a 78 malibu with a 350 and he just ran a vaccuum t off the the big tube in the front and ran brake boost and pcv off of it. also before swapping carbs i had a quadrajet on there and it did the same thing thats why i bought the holley. and that was the same with the distributor everyone told me that my distributor might be junk so i bought a new one. if you look at my pictures on here theres 2 of the motor you can see what i mean with the front big tube

are you running the pcv valve and the brake booster off of the same vac. hose? if you are you need to change that.