question for you guys
If I was you I would sell the V-6 truck and find a similar silverado that has a 5.3 in it already, then modify that engine. You will be miles ahead this way but if your truck is painted special or something like that I may be worth while.
May not be as much fun that way, but with truck prices so depressed your 6 cylinder may actually be worth more than one with a V8. 12 mpg has really dropped the price of used 4wd 6.0L vehicles. A buddy of mine learned that when he tried to sell his H2.

