First off, I went with patches on my floor pan and looking back, a full pan would have been easier and neater.Thanks! This is great info as I suspect I may have similar issues.
Was also thinking I need to do my sub frame connectors (SpinTech) first, but now I’m thinking I should do the seat pan first (so I can jack the floor if needed) and then install the subframe connectors.
Second, I welded the Spintech's on afterwards. The floorpans really can affect the square of the body so you don't want subframe connectors until after the pan is in and everything squared up and level.