i will keep this as brief as possible. i currently have an 03 rcsb gmc and blew the old 4.8 and got a brand new 6.0 L76. problem i have is that the new motor is a non-return fuel line and my truck had a fuel return line. yes a new truck intake has been swapped on as well. question is, how do i solve this problem?

 

AC Delco GF822 Corvette filter/regulator

 

is it that simple? or should i get an aftermarket regulator/fuel rail assembly?

 

Its that simple. You just need the fittings for the fuel filter.