Fine Tuning a 360 Magnum with a Brawler "Double Pumper"

The “cut out” as you refer to it is a lean stumble that is caused by air speed changing rapidly through the Venturi and the fuel flow not being able to catch up to it quick enough. You need idle, transfer slot, and squirter tuning. Like we’ve been telling you for multiple pages now. We still don’t know what the timing is and have no idea what the tune up in the carb is currently.

I’m assuming by idle and t slot tuning you mean in the metering block? I plan to graph out the timing soon once I get everything situated.
Whats the vacuum reading , in gear n foot on brakes? Choose a pv half of that or one step above half.
Make sure there is no gap between the pump lever and diaphragm and MAYBE try a diff color pump cam. Wouldn't think this would need a big shooter, there's a ton of vac and no high stall convertor, or is there?
It’s a manual, if it matters it’s the stock flywheel and clutch setup you would find on a manual 5.9 gas 1500

I may order the pump cam set but I think I should at least pin out every hole in this carb and get that data posted first before I do anything like that