My engine is a stock Chevy 250 from a 72 chevelle.It's got a powerglide and 307 gears in the back. Weighs 2900lbs. I have an offenhauser intake witha quadrajet on it....is the quadrajet to big for it? will it need rejetting? It has some running problems. cuts out under light throttle but runs okay when at WOT. I thought it was running to rich before and I couldn't even keep it running. But now I can drive it with thi new accerleation problem still too lean?but I know in the 80's the q-jets came on the 4.1 liter 6's in regals.