First time Holley tuning help

Timing is 21 initial and 37 total I do not have that timing plate or anything done to the distributor still have vac advance to the vac port in front of the carb. 37 total without vac advance. Idle mixture screws are 2 1/4 out set off a vac gauge. Cam is comp 274deh. Converter foot brakes at 2500 rpm. Engine bogs at 3k for about 150 feet and after that it takes off and runs like a champ. I'm thinking of plugging the power valve tonight and going up 4 jet sizes in the secondaries make a test pass and see where it is. Before I got a flat tire last night I had the blue pump cam in it in hole 1 and it bogged. I was going to put the slowest opening spring in the vac secondary just to see what that did for it with plans if it took off smoother with less of a hesitation then I figure I need to lean it out