Why is it so hard to get good advice !!???

The secondary's might not be coming in soon enough and it's leaning out.

I would run at least a 950 cfm carb with mechanical secondary's.

A race carb with no choke for sure.--better fuel curve--

A race fuel curve is richer over all.

If your running a duel plain intake i would get a 1050 cfm carb.

PROFORM / QUICK FUEL / THE NEW HOLLEY......