A buddy of mine built a '87 notch mustang with a grand national engine. Flat hood, stock interior, other than a few gauges and steering wheel, stock seats, and shifter, no cage or bar. Just had welded in subframe connectors, the kind that you cut the floor for. Stock suspension. With the grand national engine and trans, 3.73's and a set of McCreary ( american racer ) L60-15's that car went 9.72@142, driven to the track, and it still got almost 30 mpg on the hiway.
That car made us A LOT of money. And those tires worked great.