1993 F-150 4.9L 0-Speed Limiter

my 1993 Ford F-150 4.9L Inline 6 5spd Mods are Cold Air Intakes, Straight Pipe Muffler Cat. Only pushing her to the max 0-60 in about 10 sec. which is pretty impressive for a 2wd long bed single cab f-150 that weighs about 4000ibs