I'd be able to blow the boy's SRT 8 off the road (470 hp @ 4200 lbs).
4200 lb car + 350 lb 6'4" driver = 4550 lbs )
you = 8.07 lbs / hp ( IF you had 427 HP )
you = 12.7 lbs / hp ( current estimate at 266 HP )
Austin = 9.68 lbs / HP
Bottom line : yea, you need to pack some more HP in that heap of yours before challenging him.
( always said : "If it don't run, chrome it" )