Thank you for responding to my thread. I did jack up the upper deck of the unit using the the frame as support, with no additional relaxing of the gap. I even tried jacking up the lower belly but it lifted the entire hull off the frame so it seems as if I am stuck with what is. I was assuming those holes should have lined up with the plywood, that seemed like the logical place during construction. I hope when I fix this issue I do not discover later on why is was this way!! LOL
I no longer have the door supports installed they were rotted as well, I kept what was left as a pattern when needed. I do have a molded in setback however my door is made of some sort of vinyl, filled with rigid foam and has a bump-out across the middle to match the belly band.
I don't know if the door helps with the year of MFG. It was sold
to me as a 1978, I am beginning to believe it is more like 1971-72.
I started a gallery of photos for all to follow along or to reference to help with questions.....