Thanks for all the insite.
The tanks are low as a matter of fact. I would say less then a quarter full.
I will check all the lines and connections. Thanks for that. Also has any one of you removed the scary nylon fuel line and replaced with hard line? Not a big fan of that much flexible line. It obviously works, I just don't like it. Installing hard line may be a bit of a trick however. Hmmmm.
If you install hardline, where it goes from a solid structure to something that could vibrate, you want to have some flexible line in there so you don't work harden/crack the solid line. So, perchance, the cross-chassis intertank line may be hard, but the joints at the tanks themselves should be flexible. If you do, then you should make sure the hard line itself doesn't vibrate by afixing it to the chassis (above the level of the floor so you don't catch it on something) instead of floating free, there are access holes in the chassis where the original line ran; grommet it, and run the line there.
Flex hose from the "T" up to the pump, of course, as well as from the pump up to the carbs. Going from the chassis to any vibrating part (like this)...flexible.
I've used the usual suspects' nylon line, with a wide bend up from the T to the pump, and it seems to be ok. My head is always in the engine room, so, I check it regularly. Maybe when I put the O/H tanks and new carbs in, I'll update to current fuel line.