I have just bought a Holley 4160 600 cfm carb, put it on my Edelbrock eps manifold, and the off idle stumbles pretty bad. It gets up ok on the freeway, and when I get on it a bit, but even still is a bit rough. it acts like it is choking out a bit, and when I get on it hard, it accelerates smooth enough, without the "pause", but kinda peeters out when the down shift is almost coming off, kind of a hesitation feeling. The top end goes like hell, but that off idle circuit is stumbling unless I bump the throttle harder than needed. HELP ME!!! this is killing what little gas mileage i have.