Kevin,
"You the man". That is exactly what the smaller of the two piece floor seal portion of the kit looks like. I am convinced that the larger outer doughnut, which is 3" across, with a 2" hole in it, has to be for the late 55-59 trucks. I really appreciate you taking time to both write out the description and post a really nice photo. I can now proceeed with my tank install. And, yes it helps.
Thanks,
Rugo
