A guy around town turns a 14.1 with a 216/220, and the rest of the mods like yours, but he only has 3.42s, 862's and old style intake manifold.

So you have better gears, better heads and the good intake manifold.

 

in arizona? idk alot of people have been telling me it should get mid 14's. but idk we will see! my truck is a damn turd though