Even if you put a few $ into the 2.8 the 3.4 would be much better in your situation. about 40 more HP (stock for stock) as you probably know, bolts up, etc. A chip for a 2.8 is junk from what I've heard along with the cam. If I were you I'd stick an NA 3800 in it, make some mounts, put a 4t65e in it and call it a day. But then again that's me