Calling Holley Carb gurus

Well you have plenty of gear for that carb. I assume it's vacuum secd. Be nice to know the list number to see what the secondary plate has for jetting. Depending on how ''mild'' it is and what intake you have, you may be able to up the PV some and drop the squirter down a little. As far as the primary jet, it's fine to start with in a 600.