273 valve adjustment???

.013 intake .021 exhaust set them hot. My 66 seems to run awful fat when warm. It has the original carb that I overhauled when I bought it a few years ago. The choke goes off and the carb doesn't bleed over but it still isn't happy. I bought a used 600 Edelbrock at a swap meet and bolted it on one Saturday afternoon. Allthough I didn't have secondaries (because the butterflys hit the intake) it ran great, much smoother and cleaner. toolmanmike