this shows how dedicated some racers are to perfect their muscle car, in every way, to achieve the best 1/4 mile ET possible, on tires that may be radials, but are stock size. It appears to be a 383, but is stroked to 499"

 they can make these "Factory Appearing Stock Tire" race series cars look like museum pieces, but they use a lot of weight reduction techniques, and this Road Runner has 3.91 gears to get the right amount of traction at the starting line, and speed at the top end.

https://www.facebook.com/photo/?fbid=10161064645768484&set=gm.5699755810146367&idorvanity=996045710517424