My truck (85 Silverado in sig) is currently getting around 11 MPG in town driving, back and forth to work, less than 10 miles each way. The quadrajet carb currently on the engine is just about shot, It's seeping gas around the gaskets and I can't seem to get it leaned out, it's really running rich. The smell in the engine compartment just reeks of gasoline. Rather than rebuild it, I'm thinking of going with the Edelbrock carb and Performer manifold. I'm just wondering if I'll see any significant improvment in my gas mileage. Of course any improvment would help, that 11 MPG is killing me! Also, would you recommend I go with the EGR type manifold or non-EGR? We currently don't have inspections in my part of the state, so if it would improvement mileage I might take it off. Then again, if it doesn't have that much of an effect on mileage, I wouldn't mind leaving it on. Higher performance is not much of an issue with me. I'm quite content to just poke alone these days.
Your suggestions and recommendations would be much appreciated. Thanks.