Can I get a /6 in the 7's?

This decision is killing me, stay with the six and just enjoy the uniqueness of the six, even if it's slow, or go with the same old blah blah blah V8. If I do a build like this: intake, 4 bbl, milled/ported head, aggressive cam, header, 3500ish stall, 904 & transbrake, 4:11 gear, cal-trac set up, and a 150 shot of nitrous, what can I expect in the 1/8th? I should be at 2850 lbs.

With the nitrous you should be able to get in the 7's in the 1/8.
I would recommend a Fogger system. It is easier to get the cyl to cyl distribution right, but is more expensive. I have both a plate system, and a fogger system, and jetted at the same "advertised" HP rating, the fogger is quicker.

PS: My 66 Cuda is a full street legal type car minus exhaust. 170 cubes and weighs 3250 on the starting line. It will run low 8's in the 1/8 on 150 shot.