brett, mine looked like that after i chopped two coils out of my springs. my back end is a bit higher than yours with new rear springs, and it still looked like it was going uphill till i chopped them.
then i tried to get some moog springs which were not chopped. they dont actually list springs for a 68 6cyl hdtop without a/c, so i used the ones for a '69, (i think they were the same prt # as for a 2bbl 350 w/o p/s or a/c) but still, i could have two people on my front bumper and it was still too high. i ended up collapsing the bottom 2 or 3 coils with a torch just so i could drive it. i didnt feel like taking them out again that late at night, and i was very upset, and wanted to melt something.. they are definitly installed correctly.