i dont see how its possible to develope a car so far, and have it be beaten by 5 seconds on the GTR's first outing, not doubting it happened, but there is certainly something being left out, 5 seconds is HUGEE
and you'd like to see a supra do 8's on radials? they're already into the sevens mate (MSP did 7.8), 3300+pounds which i would deem full weight. a few have done 8's with stock 6 speed, Titan did 7.94 on stock 6 speed
as for traction in drag racing purposes, just find me how many skylines are running 9 sec passes on any tires, i have a list of 63 supras in the US alone that are doing 9's, and thats not even trying to find them, granted quite a few are on slicks, but there are heaps on radials too
i would also like to know what makes you say the inlet manifold on the supra is so crap? i've seen heaps of big horsepower cars using them succesfully