what makes you non-baffle folks think you've none? have you opened up the tanks to actually view inside, or just looked in the sender hole? virtually all gas tanks have baffles [not necessarily as Tiny's], otherwise with nothing to damp the gas sloshing around, your gas gauge would constantly bang back and forth between the stops with a half tank .... the baffle [usually 2] is simply a plate that attaches between the closer sides, only covering the middle 3/4's top to bottom, leaving space above and below .... I had a 60's truck once that a baffle broke loose, drove me crazy hearing it sliding around in there!
Bill