Sun Aug 26, 2018 7:59 am by cornbinder89
If you want my opinion, you are chasing symptoms and never getting to the root of the problem. I'd forget the electric and fix the mechanical, if it didn't pump than find out why, if the carb flooded after all that you know it has a problem.
As a mechanic I often see band-aid repairs on top of band-aid repairs to the point that the original problem was so buried that you couldn't tell what started it all. I would peel away the "fixes" and find the original problem was a simple repair than was masked by all the band-aids.
Your original problem was the fuel was not being pumped to the carb. Fix that correctly, then move on to any other problem.
The factory system of mechanical pump on the engine is a good one and will give decades of trouble free service if repaired correctly. Then and Now rebuilds pumps with new material that withstand what's in todays fuels. For less money than setting up an electric pump system you could have the stock one working.
As others have mentioned, fuel line are suspect, and unless recently replaced can be leaking, or passing rust thru to the carb. I know the bigger K's draw from the bottom of the fuel tank, and don't use a "stand pipe" not sure about the smaller K's. But that is another place to look.