l36 mods want to get into the 14s

[nascartech]

hi i own a 2001 gp gt my mods are zzp plog 2.5 catted dp hv3 insert 180 degree t stat zzp shift kit and a cone filter oh and i have mufflers removed with cherry bombs on the back god i hate the drone right now i run a 15.4 1/4 mile but i want to break into the 14s i have a l67 tb and injectors at home here and i am planning on getting a overkill pcm how much gain will that get me and will it get me to 14s if not what will 1.9 roller rockers get me into thanks