WWW.PREMIERCOBRAS.COM. We can do high 10s with a blown 4.6L and pump gas - if you go with drag radials. OR we can send you down a LONG straight WELL in excess of 150....if you've got the 'nads.
BUT one car won't do both. Aerodynamics - drag coefficients and lift vectors - are a problem. Big blocks dont have the high RPMs to do top end....etc etc etc.
Wide tires that are too wide can reduce patch pressure so they actually reduce traction.
IRS rear ends generally won't take as much torque as a live axle...and to do 10s you need a prodigious amount of torque, but you want an IRS.
I'm curious as to what a "stiff" chassis means. As far as torsional ridgidity, how many ft/lbs per degree distortion are you wishing?
What are "monster" brakes? I presume you are wanting at least 4 piston if not 6 piston front / 4 piston rears on 12" vented rotors? Those can be had in 17" wheels if the backspace is properly specified. But...I dont know what "monster" brakes are.
In short I do not believe that the car you've specified - a 10 sec, pump gas powered, IRS, 200MPH Cobra for under $50,000...ever has existed, exists today, or ever will. And its a darn shame it hasn't. That said... if Cobras could go 200, we would have a lot fewer Cobra owners who are alive.
You want a REALLY cool car that is "dead nuts" accurate as far as performance, handling, looks, and authenticity? If you want as much fun as the law allows....well, maybe a little more fun than the law allows. OK....a LOT more! then you both need to come to KC. We will strap you into a 4.6L blown 289 hybrid machine and take you out for "THE RIDE". If you want more performance than this car delivers.... I might suggest a used Mig 29. We've yet to find ANYONE...and that included a professional race driver....that have said it was not the fastest street car they had ever been in. 2nd and 3rd are just mind boggling..... but come see for yourself.
All the best.... Bob