If the fuel pickup was the same shape and depth from the rim that sits in the top of the tank it should be fine.

Personally...

I would drop the tank, remove the pickup and check it all out.

With the rig stationary ... 5 gallons of fuel should be quite sufficient to satisfy the pickup and not allow air to suck in.

Check it now and get it right, lest thee might find ones self in deep do do some cold lonely night along the interstate...with no fuel flow...


Summer in the driveway is far and away better than the edge of the road on a dark night....

Been there done that trick



Good luck