[mosesburb]

Originally Posted by Beelzeburb

Thanks mosesburb, some good advice there.

Here's a page from my Automobile Guide printed in 1972 which describes the basics of the kind of system I was envisioning (perhaps a bit primitive by today's standards).



I'd think that it would work, but that it would probably be a good idea to plumb a valve inline that only opened above a certain pressure. My Fuel & Emissions supplement is on the way now, so I'll have a better idea of the overall scheme of things soon.

That should work fine, but with this sending unit the 1/4" line is all you need. If you look at the underside of the sending unit where the 1/4" line enters it, and see that "thing" on the end of the 1/4" line?? That is the positive pressure valve that you want to put in. GM beat you to it. You do need a charcoal can on the end of that line though....