Thanks guys.
I've only bobtailed it so far, last Sunday to a show about 1hr away. Runs really nice, really notice the longer wheelbase as it doesn't "buck" around as bad. I tried running it up to the new top speed(72 mph), it gets there, but only with a tailwind! Really lacking power but hopefully someday I'll rectify that too. 180 hp only gets you moving so fast, even with only a 12K lb truck.
I hooked onto the trailer that afternoon to get race car loaded up so I can get out this coming weekend(maybe, if the rain EVER stops). I think I'll have some issues with getting around the corner and into my driveway with the longer truck. The streets are just barely 2 cars wide with ditches on the sides(ugh). Might have to go up a few streets and come back from the other side and make the loop? Five feet isn't much, but when you don't have much room it's MILES.
One thing I did notice, not sure exactly what it was, but, when I got it up to just over 55 mph, it got a bad "bobble" out back and it shook the whole truck. You could power through it and then it was fine. Only thing I could come up with is the fact I still had the rear tires aired down to 70 psi(when it was spring ride). With new bags and shocks, I think the tires might have been counter-reacting and causing the bounce? I aired the tire up to 85 psi when I got home, so I'll be curious to see if that helps. I don't think it will be an issue with the trailer? Never had this problem before, so it has to be something I did. I do know I need to get the bushings rebuilt in the rear crossmember(under the bags), but not sure that those would cause a problem like this.
