Nice looking truck. Go ahead and slide the AFC forward and then check for smoke. If you see none, you can always hit the starwheel a little more. When you slide the AFC forward you will really notice a little more kick in your step.
You'll take care of that brick wall with the 3K GSK. It will make towing that trailer a whole new experience.
Once you get your springs in, you may want to adjust the kick down cable going to the trans. It is the cable that is pulled out when you give it the throttle. If you feel around cable housing where it goes through the bracket you will find a button you can push and pull the cable out some. A little adjustment goes a long way. It will delay your shifts which will help with towing and will also raise pressure inside trans a little which will help clutches and torque converter. More pressure equals less slip which equals longer life.
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'96 Dodge 3500,KDP killed, boost-pyro-trans temp, not stock anymore
'01 Dodge 2500 4X4, EC, LB, 6 speed, FP-pyro-boost,
'97 Chevrolet Suburban, K1500, 4.10 gears