drive it to work, school, tow the boat to the lake, ANYTHING with the 3400. I have no idea what kind of power it makes, it has never seen a dyno. A 6.0L with some LS6/LS2 heads and a nice 224 or similar cam will be fine for what you want. Hell, stock 6.0L heads are good too, the LS6/2 will just bring up compression a bit!