I don't have first hand experience with the 6.0L (my cousin has one and I have driven it but that is about all) I read some sites saying they have lots of trouble with them. Not so much with the motor but with the computer controls. If I had the money for a new truck I would use BD, not run it on WVO. If you realy want to use WVO I would check with some of the companies who have experience doing conversions like goldenfuel systems and veggiestroke and see what they have found it took to do the conversion sucessfully.