Thanks, I am just looking to make my 442 perform respectfully so 280s even 340s are on my list for tires. Not trying to dominate the pro-touring GTV. Likely going with just a 245/45/17 - 265/40/18 stagger out of the shoot just to see if that can get the car to hook up, turn, and stop respectably. You know, perhaps get a "holy sh*t, that's an Oldsmobile" reaction? Beyond that just having some fun.
But, if I get the bug . . . I've got an engine core that is easily capable of a couple hundred more HP [400HP 500lb.ft. now], more carburetion and cam, actually get headers on it which I hate even the idea of, put 6 gears in it, different rear end, chop up my fender wells/flaps in front and notch my frame in the rear to get at least 285 rubber on all 4 corners, and probably box the frame more and add a few more UMI or equivalent toys. Right now, it's still a show quality low mileage 442 that I don't want to beat on too badly.
Sorry, only pic I have at the moment still with the SSIIIs on it. It is on jackstands putting on all the [mostly] UMI suspension parts and [Wilwood] brakes I already have now over in my build thread.
Note: Know that you guys are responsible for this inspiration . . . we'll see later if it was good or bad?