My '86 K5 w/ 305ci has a 4bbl Quadrajet carb that is acting up. it doesn't idle right, and the electric choke is about shot on it. the truck has ~206,000 miles on it, and instead of messin with this carb more so than i already have, i just want to replace it. I've looked on ebay for Quadrajet carbs, can anyone tell me the model number i'll need for my truck? i'm pretty sure it's a 750cfm, just need someone to verify. i'd greatly appreciate any info you guys can give me!