OK, I don't know if I am "tilting at windmills" here, or if this fits under the "don't fix what ain't broken" rule. The Pontiac engine in my '55 has a 1405 Edelbrock carb. I put a fuel pressure gauge in the line. It has about 9 lbs of pressure. Edelbrock reccomends 5.5 lbs. The fuel pump appears to be a stock Pontiac item. So I bought a fuel pressure regulator. Put it in the line and it only dropped the pressure down to about 8 lbs. The pressure regulator did not come with any instructions, as to which way to turn the regulating screw to adjust the pressure. I turned the screw out with no change in pressure at all. Then the regulator started to drip gas and I shut the engine down and took the thing off. As an aside, when I put the fuel line back together with a new filter, now I have over 10 lbs on the gauge. I think I need a frosty beverage or three....