If you get a replacement original pump you will be fine, no regulator needed.

If you want to eliminate your current fuel pump as the problem place your temporary fuel tank about a foot or more above the carb, it should run fine if that was the problem.

I am leaning toward a carb cleaning and rebuild, what you describe does not sound like a fuel pump problem.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-