Worked on the fuel pressure regulator a couple nights ago. The goal was to hybridize the two. You can see the Montero has two fuel lines, pressure and return where the Lexus has one with a built in return. I feel that this could be done a number of ways and the return doesn't need to be in tank. I chose to use the in tank return just because it's less hoses and lines, the pump is easy access on the Montero so it might not make sense in a different vehicle.
Lexus SC fuel pump on the left Montero on the right
Montero Left, Lexus Right
I took them both apart and made cut lines, the bracket in the tank for the Montero pump needed a relief ground into it to clear the FPR as well. Super easy.
Originally I had planned to braze the lines together but that meant prying that 22 year old sensor out of it's crimped boss. I don't think I can easily get that part so I just used fuel hose at the connection. Welded shut the old return and here's the resulting assembly, got a new pump and gasket coming now.