My cousin ran 255/50 BFG Drags on his stock Pony's and anything more than that is too much. Another guy at Napierville runs 9.6 in the 1/4 with 255/50 drag radials on stock Pony wheels! I saw him run a 9.8@142 myself, 1.4x 60ft. 347/Vortech/AOD and the car looks bone stock....