I'm not gonna quote train and pick apart all the non sense you just typed. Do you even know what sprint cars are? Do you know what the SCCA is? You think a mustang is bathtub? You are beyond clueless. You probably don't even own a car let alone have the know how to build or fabricate something from the ground up.
You obviously aren't a car guy. We drive performance cars on the street because we like to build what manufacturers don't for some very obvious reasons. I wouldn't even think about selling something I've built to an uneducated or inexperienced driver, someone like yourself for instance. It would make them piss their pants when they pressed go button. Also, as you so adeptly seemed to miss, I could make any one of my mustangs corner well enough to keep up with just about anything ever made let alone when it went straight again. It's amazing what you can fabricate when you know what you're doing. A BSME helps, but not much. Most is learned the hard way. The whole "fun" with guys like us, guys that like to jump out of planes, and the rest of the adrenaline junkies is trying to control something that can never be controlled. Unless you're a car guy, and I mean someone that builds cars, not the douchebags that buy cars and pay some other idiot to install parts and change their oil - real passionate car guys, such as the guys on Top Gear, who know the joy in having a car you correct the steering with the gas pedal, you'll never understand.
And manual gear box? I've used anything from T45's, 3550's, Lenco CS1s 4 and 5 speeds, GF 5rs, Jericos, T5's, T56's, TKO 500s/600s, Top loaders, M22s.
I'm pretty sure I know how to shift: This was a liberty T5 (a reworked stock mustang tranny) all out of a little 302 with .500 lift, 58cc combustion chambers, dual plane intake, and a 650 holley. Basically not that far from a stocker.
http://vimeo.com/5558243
As far as my rides: Roughly 2600rwhp
I have another sn95 with 1038rwhp. Has a 331 and a single turbo. I also have another sn95 with a 342 and a T Trim - has just over 700 at the rear wheels (just bought this one and have the motor out now). My F250 diesel (what I pull the cars with makes 1400ftlbs of torque and right at 700HP at the wheels). My F150 that I just finished fabricated a turbo for (5.4L 3v) should make around 500 at the wheels still needs tuned. I have a 69 chevy C20, a 68 camaro in pieces, a 79 Chevy K20 400/400 combo, and my favorite a 79 Ford Fiesta (not festiva). Oh and I have an old squad car (2003 crown vic interceptor) I bought to do something stupid with at a later date.