Sorry for the woes........ but it does highlight the importance of having the basic essentials ironed out.

Quote
my pump is a in tank 450 LPH


450LPH........ at what pressure?

I’d say you need about 350LPH@ whatever the EFI system operates at(55psi??)

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