It’s Just A Pickup

[Low Elco]

Ah, I should have thrown more info in. It's the yellow truck in my sig. It's a 70, with a 90 Jeep wrangler tank in the back and a 91 Ranger filler assy. No system at all to start with. Currently vented to atmosphere, to avoid the dreaded vacuum problem. Works great, just stinks. The specific question should have been, did that vent line just run to a stock 71 can, or something special? Also, is it a straight vacuum hookup off the motor, or are there switches, valves, and doohickeys involved? Thanks for the help!