You can get well into the 13's with a tame 302 if you use the right parts . I ran a 1982 mustang ,with flat top pistons ,1966 289 closed chamber heads milled 0.040". Wolverien blue racer 292 cam with 512 lift , wiand excelerator intake 3310 750 holley carb , 9" rear 3.89 gears and stock C5 with c4 valve body . My car ran 13.71 at 103 mph . my 60 ft time was bad at 2.30 so my car would have went alot quicker with a converter . My car weighed 3150