First off nice new ride. But some constructive criticism here. I would spend some time on that drivetrain. The D60 will not stand up to 44" tires with any sort of horsepower under the hood. Mine couldn't even stand up to 44's with the stock 350. Also you said you are going to a HP60. That means you will have the smaller knuckles which are only 5 stud and thinner material. I broke those IMMEDIATELY once I went to 44's. Another problem the 60 is going to have with the 44's is the outer 30 spline stubs will last about ten minutes. I thought I would never go bigger than 40's. I now run 44's and not one part of my D60 is stock other than the housing. Your gonna need 35 sp chromos, Reid, or Crane knuckles, new crossover setup because the kingpin steering arms will be different than that setup you have on the 44 right now, and an upgraded pinion yoke because the HP D60 is only 1310. So Go 1410 there which means you will also need 1410 driveshaft yokes, tcase, etc. your looking at a couple grand right there to run those 44's with any confidence.
I only say this because Ive been there done it and there is no point in throwing huge power at something that will explode on contact. Add a traction bar too because those springs are so huge and there is so much arch in them, once you put serious power to that 14bolt you will have so much axle wrap plan on wasting pinion yokes and u joints. Personally I would lower it about 6-8 inches and cut the fenders. It will still look really good. that's how mine is and looks good. plus it is so much more stable, and way better driveline angles. I can send you some pics if you wanted. Plus then you wont have all those huge drop brackets for the bumpers and body lift stuff and silly huge gaps between the drivetrain and body.
Nothing less than a 5.13 gear is going to get you anywhere with 44's. regardless of the motor. You never said what your intentions were with this thing. If you plan on wheeling it and hitting some mud or rocks and don't want to look like a complete buffoon when it falls apart, I would highly advise taking the above listed advice. If your building it to cruise into the local burger joint and parking lot pound, then I guess it will be fine.