76GTS is what i am going with,my combo isn't very different from yours except for an expensive block.
I know of one car here with pretty much the same combo that went 6.60's in the 1/8 on 20# with lots still left in it,the turbo is good past 30#.Thats low 10s if you do the math.
Another friend of mine has run some low 7's in the 1/8 on 18# with a 76 gtq.
the GTS is worth about 100hp or so over the GTQ,I know it is rated at 1150 hp,thats only 50hp less than the old PT88.