83 c10 fuel smell in the cab

[Walts_restoration]

Ac truck. The PO took out all the "unnecessary vacuum line" and instead put a bunch of caps in its place. i don't need it to be 100% smog approved, but would like to rid myself of the smell. Cab is solid, rust free 92k mile truck, seals are good (or at least should be) etc.


First thing i noticed was that it has a metal line running under the radiator to the charcoal canister, but all others were open. With it like this i had gas smell when heater or ac was on occasionally but never anytime else.


So i decided to cap the other 5 connections off now i have gas smell pretty bad all the time. What of the other 5 connections do i need to connect to the intake, and should it be on a ported passage way or all the time passage way?

I have dual tanks, whats the probability that something else fuel system is leaking? anyway tips of things to look for? selector works every time so i know its not bad.

And is there supposed to be a filter before it goes to the vacuum diaphragm ball? Just trying to make it smell a little better inside for me and the girly. Thanks guys.