No King here, just having fun with six packs. I think many are asking your needs and what you expect, my end carbs flip open like a pit bull out of the gate 3k area. Ive the lightest spring and then cut it a bit. Alot of work in them though..

What is your rpm area (stock intake)? my cam likes 7600 and with a modified intake its semi easy.

If all else fails put a plate kit on it, six packs seems to like spray and its fun.