Hey, Lately ive seen these type of trucks running for about 120,000-160,000 for a pretty nice new 379 or 387. I have seen new trucks that have all sorts of modifications such as full fenders, larger sleeper, custom paint etc. for upwards of 250,000. I would imagine these prices are dependant on the options you want. If you go to www.truckpaper.com thats a great site for reference photos. They have all different makes/models and combinations so its an awesome site to get some ideas. As far as a 16 cyl. engine, maybe some off road versions had those?? I know the gigantic dump trucks have engines like that. If i remember correctly 12v71's and 92's were offered in some On highway trucks. If you want look for a KW W-900 with a 12V92, some guy custom fit that beast into his rig. sight of beauty!!