Got agree there, i used a vetteworks flange and used the OEM fuel pump module and made an access door in the floor, super reliable and easy. Had to boil the tank out though before welding.Have you looked at doing a fuel module over the inline pump? Throwing a mid-2000s GM fuel module in the gas tank gives a lot of peace of mind. I know some folks don't mind carrying a few spares, but its never fun to swap out a pump when it's 100 degrees.
Let me add. Epic vehicle. It's easy to enjoy your handiwork.