with the package tray reattached and holding the quarter panels together properly, I was able to cut out the brace I had welded in, and check the fitment of the decklid and tail lights. Still using the temporary clecoes to ensure that the tail panel and trunk pan and gas tank braces are all lined up properly, and not causing any weird gaps. Overall, considering the number of aftermarket panels this car is needing, I'm fairly surprised at how well everything is fitting together. Looks like I can start welding the gas tank straps in, and then the trunk pan!