all NA? are you talking just cracking into the 14's? or a 14 flat? a 14 flat really can't be done for cheap at all. as you'll need a sick head, stage 4 cam, all boltons, upped compression, and a lot more. you may break into the 14's w/ a FR head, Crower 2's or 3's, SVT header, 3 inch back, FR intake, etc. look to spend about 4k or more! best to go w/ a JRSC, or a very mild turbo kit. that way, after you up the trans, your good for more. but 14's on an auto is difficult. and very costly
Now I rive 2 7.3 L diesel trucks!