Don't get an Edelbrock, but if you have to have one I'll gladly sell you my 800. I tried a 750 Edelbrock and then an 800. They just don't like a 440 with a little extra cam. They are great carbs on other engines but not a 440 with low vacuum. I could not tune the off idle dead spot out of either one. I bought a Street Demon and love it.