That front end is riding quite low! Shocks look 90% compressed at rest and the first 3 coils of the spring are touching. I'd take a guess that the suspension wasn't upgraded to handle the weight of the 4bt.
I'd also say the Dana 44 is wayyy undersized for that rig, especially under the 4bt.
Wife said it was more peppy than 7.3 when test drove and about as loud. It has 4 adjustable shocks in the front that are turned to lowest setting, so that is why it’s setting lower but could be adjusted.