Mark,
I have to ask. Was there a substantial difference with the supercharger? If so, were you not happy with the power? Ultimately, I'm wondering why you are going with the diesel conversion over the supercharger. Especially considering the premium that diesel has been showing over gasoline over the last year or so.. I assume it's for more torque, right? I found this setup on ebay...Not sure what you could sell your truck for but it may offer an alternative..
http://cgi.ebay.com/ebaymotors/Humme...9c6e0a67#v4-32
Cheers,
Ed
PS.. I'm in no way affiliated to the seller.. I'm actually curious about the vehicle for sale as well.