[tirwin]

My first thought is it's likely the relays and I'm basing that on the fact that people report high "infant mortality" with newer relays. And consider that with older wiring you have an increased likelihood of corrosion which creates additional resistance.

Just an idea but to check the fuel pump go for a drive and then get the car on the shop's lift and drop the belly pan to access the pump. If it feels too hot then maybe you can get it replaced under warranty.