I talked to a reputable Rovers shop today about replacing my 3.9 to an R2-8 Cummins in my 1995 NAS Defender 90. I wasn't at all shocked at the price ( as I thought it would have been much more actually ) and think it would be a world of difference over all . My questions are : 1 would this help the reliability level . 2 would it decrease the value or increase the value of my truck ? I'm guessing from what I've scene increase? This would allow it to be a life long drivable vehicle without having to lay under it. They would also while its apart treat the frame . Feedback would be appriciated .