I have (well, had, since my Trooper is dead right now) one of these in mine. I have a stone stock 2.8 except for a 2 1/4 exhaust with a low restriction cat and muffler - oh, and a flipped lid on the air cleaner! <img src="/forums/images/graemlins/lol.gif" alt="" />.

I noticed a slight improvement in power, but nothing outstanding. At the time he was selling them for $30 and I thought it was an OK value for that. $80 is maybe a bit more questionable for how much value it would provide.

It should work with the 3.4 (they are the same computer), when you get down to the actual order, he asks for info on any engine mods as he can change some of the EPROM settings to optimize for those.

With the 3.4 swap and all your other goodies, once you get everything dialed in, I don't think you'd see that much of an additonal gain from it...

Jay