340 Gets Terrible Gas Mileage

Thanks for the post. That is a good question. Given the 4 barrel, performance cam and headers I expected more performance from it. Its not a dog but I think I should be getting more out of it. Maybe a slight hesitation when starting out from a dead stop. Let me know what you think.
Sounds like it needs more initial timing. You posted this Thursday. This is Saturday. Have you even checked initial timing yet?