I've narrowed my search for a new turbo down a bit. I'm looking at the Super B or an S300 62/14. My truck is in my sig and it gets used for work both towing and hauling. Just wondering which way I should go or if there are any issues with either of these turbos.

 

They are essentially the same turbo in design and size. I have an S-300 62/12/65 and its too small for me. As I am rebuilding it, I am borrowing a Super B Special 64/14/71 and its a really nice turbo though some say its a dog. I would vote for the Super B with your mods, but it would start getting small with any upgrades to the fuel system such as larger 80+hp injectors.

 

I see no fuel upgrades beside a plate, so I'm wondering why you are in need of a turbo? If you are set on one, for your current setup, I'd look at the Super B. Its not a big step up, and its a complete kit with down pipe, should drop right in. You could grab an HE351 for a couple hundred bucks and install that. Its a 60mm compressor, and it should spool much quicker than the stocker.