I'm trying to formulate a plan for my Sub. The 350 I have now has nowhere near the power I want. I was looking into either a TBI 454 or possibly a diesel conversion. It will be a while before I begin this project but I want to start getting my plan together. I know the diesel would be a more difficult swap. I would like everyone's opinion. The pro's and con's of each choice. Any and all suggestions are welcome. Ok, it seems like the deisel is winning out. Now my question is what kinda deisel should I consider. I'm sure a 6.5 would be the easiest swap, but what are my other options?