Well I took it out for the first time for some serious four wheeling yesterday, and I am impressed. It doesn't have a whole lot of flex, but most vehicles with a 149" wheelbase usually don't.
The ride is ten times better than with the stock springs, and with the new adjustable drag link I really have a short turning radius, for a 22' truck anyway...

It is definitely tighter than stock.
I didn't make any changes to the 440, but I have to tell you, it has MUCHO CAJONES. It was effortless and never even sounded like it was working hard. This was the first real test of the electric fans I installed in the spring and it kept the motor in the operating temperature range the whole time. I am going to have to invest in a 100 amp alternator though to offset the power consumption of the fans, but it is not essential at the moment. There were a couple of times when I shut it down hot, and when I went to start it again, the fans kicked on when it was trying to start and pulled the 1000 amp battery pretty good, but it still started. I may have to investigate a cut-out for the fans when the starter is engaged.
I am VERY happy with the results of the rebuild, and I wish I could post the pictures I took of the adventure...
Mike