Keep you exhuast very quiet or not too far from stock or it will sound raspy and hollow, it's very hard to get the deep tone from a v6.
i think a 60-70series would work fine, i had a quiet dynomax on mine and it sounded just throaty enuff, but at least it wasn't annoying.

Comp cams has a cam for you truck, go to their site and check it out, it's the 112lsa cam.

keep us updated,

allen