suspension setup oppinions needed

Well, I will say to you, first thing that should be done to any car is suspension IMO. I did that last, and that made the biggest improvement over all the others. What good is all the horsepower in the world, when all your tires do is spin? You have asked alot of questions, I honestly dont have all the answers. I have seen cars with stock suspension do better than those without, but that all comes down to how it is set up-and the driver. I have HPM megabite Jrs, and let me tell you, my car hooks! I threw lakewood 50/50s in at the same time, and damn, the motor damn near died the first time I dumped the clutch at the track. I have bfg dr's on it too. By the goal you have set, you are going to need a beefy setup to handle the launches required to meet the et you want.
Here is how I would do things:
1 subframes- trust me, they make a world of difference
2 drag shocks, struts, control arms, springs etc.(dont forget to weld the torque boxes!)
3 Clutch, trans, driveshaft, and rear Example (I have a centerforce dual friction clutch, followed by a Tremec Tko, fms aluminum driveshaft, and drag radials- I blew my rear at the track trying to launch on the new suspension, the rear was the weakest point since it was stock(except for gears)
4 Once the drivetrain and suspension (along with the frame) are set, then do motor mods.

After toasting two t-5's, and blowing my rear I can attest to the need for the right setup of things. One part has to equal the strength of another, or you will have breakage (a chain is as strong as its weakest link).

With the 90/10's dont expect the best handling in the curves, those struts make it pretty much a straight line car. I would recommend Hpm megabites, they have two settings for traction, I have mine set on drag race.
Tb, maf, etc dont make that much of a noticable difference. When I floored my stang the first time with the dr's on it and it had complete hook, whew! It felt awesome against the neck. Make your car hook first, then give it the power.
TED