Imo, the pump is waaaay too far away from the tank, and too high up as well.

If it’s the 250 pump, it really needs to be used with at least a bypass return return system at the pump.

The best solution for where that tank is, is to use a submersible in take pump.

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads