well, normally I would say no to using an elec. fuel pump on a stock ride but maybe latley im thinking it may not be a bad idea for 3 reasons.
1. Crappy oil with no zdp in it could cause the wear you are mentioning [although it doesnt seem likely but maybe] elec, pump cures that

2. Even crappier gasoline with alchohol and/or oxygenators in it cause havoc with old style pumps, deteriorating the rubber and due to the fact that the pump is mounted on the engine and somewhat close to the exhaust manifold, the crappy gas sometime tends to percolate in the pump and the lines. Pump cant pump vapors so when it is hot ous you have the problems you are having maybe. {when it acts up, try pouring some water on the pump and see what happens}

3. Like you said, the quality of the parts for a 37 year old car are going to hell in a handbag! Especially the ones you may buy at the "larger" discount auto parts store. When there is very little demand for certain parts, you have very little choice [for the average replacement parts, not the HiPo stuff] the hipo stuff cost $$$.

So my advice: Try an electric pump that puts out 14-15 psi and regulate it down to 6 psi. {or as little as you can gat away with}. Also run a return line from the carb back to the tank. [use 1/4 line on the return line and shove a .030 mig welding tip in the rubber line to act as a restriction on the return.] {clamp around to hold in place} This will keep the pressure up in the fuel line and the return line will allow somw flow to keep the fuel moving so it stays cool.
Mount the pump back near the tank as low as you can and still be safe etc. Wire it appropriatley [call holley for safe wiring diagram], Also it would be good to replace the the rubber fuel line with actual fuel injection rubber fuel hose. This will not deteriorate and also insulates much better than the standard fuel line. Last, it might be a good idea to snag an inertia valve fron a ford product as added saftey measure. shuts pump off in case of accident. Run fuel line away from any heat source [at least the best you can]