Wow you're talking some serious power out of a 67/67! That's exactly what I'm running also by tater. I like it! I'm on stock sticks and fuel too. It spools fast! As far as pulling I think it's a little big to yank 20k pounds down the road at 70 in 6th gear. 5th gear it's perfect! My egts are a little warm for being stock fueled, at least I think but nothing close to terrible by any means. I have yet to check DP with it. Currently something made it's way past my air filter so I'm going to have him put a new wheel on it and rebalance it for me before I check anything.
Sorry for the ramble but reviews on the turbo are hard to find and others may be curious