Saw it in Idaho. Wasn't sure I wanted to go, but we went and am glad I did. It was spectacular. Temp dropped about 20 degrees or so. Darkness was different than a sunset, more like looking through dark glasses. Halo around the sun at full eclipse was fantastic. Then quick lightening and...
With the transmission in park and with no locker in the rear when you spin one tire the other tire will spin in the opposite direction. The drive shaft will not turn as the transmission is locked in Park. This is normal. For the front if the transfer case is in 2WD or neutral when you spin one...
Alot depends of what kind of driving you intend to do. Rock crawling versus trail riding, etc. Over all I think you are looking at regearing. That being said I think you can be happy with your 4 banger understanding the limitations.