not a problem, im a car salesman, my job is landing people on the right car
if youre not already a subscriber, check out Diesel Power Magazine, really great articles regarding general Diesel knowledge, and very up to date on current Duramax, Cummins, and Powerstroke mods. They even ran the article on the first super/turbo Duramax, and the Duramax powered 1970 chevelle

. I have subscribed and the only complaint i have is that they dont have enough "real" trucks. All of them are like $100,000 show trucks with lifts, 20in aloca wheels, twin turbos, 44in tires, lights, bumpers, sound systems.... and frankly it makes me jealous
But it also covers mercedes, vw, audi, and other makes and models of diesel around the world. They have breaking news on diesel related policy in government, and latest performance parts, and they even have a military section where they focus on a military diesel powered vehicle in each issue. They do historical articles (i learned where REO Speedwagon came from), on brands, engines, transmissions, etc. They do before and after testing, they ran very informative articles on running CNG, biodiesel, and other such articles.
I believe the first D60 front axle swap was covered in that magazine as well. Sick truck.
The 6.2/6.5TD were not made to be powerhouses, they were made to last forever and get decent power with great fuel economy. And they do what they were designed to do. But neither engine will ever be a performance engine. thats for sure.