Return? Feed?

[REGAL8r]

Can anyone with a grand national tell me which is the return line and which is the feed line from the 2 lines which are I believe are 3/8 and 5/16? Also I see the vent to canister on pass side do I use that for vent my 02 4.8 that I'm gonna be running with twins also what in tank pump can I use on the stock gn hangar? Plug and play preferably

 

[TURNA]

Larger one is always feed

 

[UNGN]

Larger one is always feed

What he said.

By "twins" you mean Twin Turbo? The 3/8" fuel line nor a single pump on the factory GN hanger will really support a twin turbo 4.8L LS motor... maybe @ 6 psi of boost, but not at 14 psi. You can tell yourself you'll never turn up the boost, but you are just lying to yourself.

If you intend for the the car to go around corners, the factory baffle in my '86 T-type tank was totally inadequate for that: It was just a wall separating the front half of the tank from the rear. It worked fine for acceleration but over about .8G with 1/2 a tank or less the pickup would starve.

 

[REGAL8r]

Thanks guys for the clarificationso I'm gonna be putting in a low mileage 4.8 stock first and get it up and moving as I have another block to build my twin turbo so there won't be that much down time between swaps.so would I just need the bigger 3/8 line to run the feed from my stock 4.8 (that had a ls1 intake and is dbc) and use the smaller 5/16 (return)line and convert at the tank to run a gbodyparts setup(filter and in tank pump)and do I use the vent(pass going to charcoal canister) for vent?