return line question

[leadfoot067]

im injecting my 73 K5 and i need to run a return line...i noticed the factory vent line is there can i use it? has anybody used it for return?

thanks

 

[4X4HIGH]

I would run a new return line and leave the vent line hooked up or you run the chance of imploding the gas tank (sucking in).

 

[sweetk30]

could swap in a newer sender unit with return in it.

 

[1979jimmy350]

i ran mine to the vent line hole, that line is only for the carocle canister the tank is still vented through the cap if it is the older style. Or you can run a t- fitting in the filler tube to put a return line in if you want to keep the canister

 

[leadfoot067]

ya the cannister line is the one im speaking of....mine hasnt had a cannister since ive owned it....as i do more reading into the subject it seems most return lines are 5/16...so mabe it will work...iwas simply trying to avoid running more lines....

 

[mouse]

On my '77 the original return line (or charcoal canister line) was much smaller than the factory TBI return line so I changed it out to the factory TBI line. The old one couldn't flow enough.

 

[HarryH3]

When I added the line on my '75, I just ran a new line and drilled a new hole in the sender plate. If there's room, you could use a bulkhead fitting, but I just had a buddy TIG weld mine in place.