For what you are saying you are wanting the truck to do, a stage three sun coast kit with a precision converter will be just right. This is what I have in my truck and it's seen some pretty good horsepower both on the sled track and drag strip. I also pull my 33' 5th wheel camper all over the country all with no issues. I bought my kit from George and had a local guy install it for me. If you can install the kit yourself you will save a bunch of money. I would also recommend buying the kit from mikeL as he is a supporting vendor and has great customer service and troubleshooting help.