Either choice and you'll be hard pressed to buy stock in goodyear. The diesel choice i like since your putting it head to head with a Hemi. either one would be cool, one of the buds is making a decision much like your own right now between a Cat or Detriot or small block hemi. I told him the same thing most said already. built it however is going to make you smile driving it. if you have that much experience with diesels, i kinda think from the way you talk about em, you kinda already made your mind up? especially since your selling point on the Hemi was that you'd thought that you'd supercharge it, i doubt id even need to say what the options are on a diesel if your already building em for the track....