I did something similar with mine except I just changed the oil in the fan clutch to a thicker weight so it would engage at a lower temperature but would still offer some acceleration and deceleration dampening.
http://board.marlincrawler.com/index.php?topic=98969.30I also made a 3" turbo dump pipe
![](http://i1071.photobucket.com/albums/u513/nadiller/dumppipe5.jpg)