Initially, the front end was tacked in place so that a fender could be hung to make sure that the front cross member was located correctly. Fatman supplies tubes that slip over the shocks to simulate ride height without having to install the springs. When the suspension was compressed to this simulated ride height, the lower a-arms were running up hill. According to Fatman, the lower a-arm are suppose to be level to +/- 2 degrees.
After several phone calls and a ton of measurements, it was determined that this truck has a 3/4 ton chassis. The 3/4 ton chassis is about 1" taller than a 1/2 ton. This caused the distance between the hat and cross member to be too great.
Once we figured this out, I trimmed the cross member and everything lined up perfectly.
I have to say that I was very impressed not only with Fatman's front end, but also with their customer service. It's nice dealing with people that actually understand suspension geometry.