Fuel sending unit help

[codfish]

Installing a Holley sniper on my 84 k10. Single drivers side tank.

Dropped the tank to modify the sending unit for the return line, and found this.

The 1/4 line was pretty much plugged, so I cleaned it out. The 3/8 supply line is fine.

The middle line, the 5/16 line. Where does it return to??

I guess I’ll need to buy a sending unit without that “cup” on the bottom!!

Great!! Can’t see no way to remove it without destroying it.

Codfish

 

[Scott91370]

On my 82 and 85 the third line ran up front to the charcoal canister.

 

[75gmck25]

On my truck the third port has a T connection to the other tank and then one line runs to the charcoal canister under the hood.

 

[fast 99]

The 5/16 line vapor recovery and vent. Will need to change gas cap to vented style or if the recovery system is all there hook it back up.

 

[gogo14910]

My 5/16 was fuel to engine, 3/8 was return unused fuel to tanks and the 1/2 was vent. I’m 7 days behind, did you get it all squared away? These are photos of my deleteing the passenger tank and the tank selector valve.

 

[codfish]

I ended up getting a new sending unit that I could drill a 9/16” hole for the sniper return line. I only have the single tank, and I deleted all the stock fuel system except the tank, which is new.

Thanks
Codfish