I have a 78 K5 Blazer, with a stock 350, and a stock Quadrajet. I think the current carb's metering rods are too lean, and I wanted to fatten them up. This may be like taking a shot in the dark, but can anyone here recommend a good ballpark size for the metering rods to add some performance? I really don't have the time and money to buy a lot of metering rods and experiment. Anyone here have good luck with a particular combo. The car idles and starts great, it just doesn't have much grunt. The engine has a stock GM dual plane manifold (No EGR) with a stock quadrajet with a dual exhaust, no Cats. According to the build plate, the car has 3.73 gears. Thanks for the help.