Upgrade the pump while your dropping the tank.. It's a return style fuel system so no real down side. I've ran genuine Walbro 255's in many cars from mild to wild on the street with zero issues. They are solid pumps but for an otherwise stock car way over kill. If you don't have to replace the tank, straps, sender, pump assembly etc then just pickup a gs340 genuine walbro from highflowfuel.com with the install kit for $80 shipped and call it a day.
The BMR torque box reinforcements I would prob skip and look at UPR or Wildrides. There kits a boat load cheaper then the BMR's and have held up to serious power in endless amount of cars through out the years.
Subframe connectors are a matter of preference, some like the full length, some like the short but almost everyone likes them with the cross brace. Whatever style or price range you decide to go with here. It'll be a huge improvement on how the car feels now without them and it'll save you from having stress cracks in many spots of the car and paint. These should have been on the car from the factory.