Electric fuel system

I’ve got a challenge for the group. I have a 440 with a modest tune 425HP in a 67 Dart GT convert. The engine compartment simply doesn’t have the capacity to dissipate the heat and the mechanical pump fails after 15-20 minutes. I mounted an electric pump over the rear axel and simply bypassed the mechanical pump. It works great and no issues except the mechanical pump is very loud. I’d like to eliminate. Ideally I’d like an in tank pump but everything out there seems tailored to fuel injection – 65 PSI versus the 5-7 PSI I need. Wondering what others have done to fix this issue. Thanks Steve