Update: new running gear is installed. It took three long days.
Along the way I found that one of the spring eyes had a nut missing


and the trailer breakway switch didn't work


My bad for not keeping a better eye on things.
I bought everything but the springs from R & P Carriages in Illinois. I asked for 5,200lb or 6,000lb axles but they quoted and sold me 7,000lb Dexter axles. Supposedly the only difference is the bearings but I don't know. They sent eight lug drums instead of six and offered to swap them for six lug but I decided to stick with the eight. Shipping was a reasonable $60 per axle and the rest was free.
I got the six leaf springs from etrailer.
I got new Sendel T16 16" wheels and Falken tires from Discount Tire with 0% interest for 12 months.
Everything is installed and greased but I am not completely happy. The trailer is six inches higher than before, which is quite a bit more than I expected. I now have to get more wood blocks. The biggest problem is that I now have porpoising. This is with the same trailer, same WDH and same tow vehicle. The loading of the trailer is the same.
I have re-setup the WDH so the trailer is level and I have a small amount of squat and a small amount of increase at the front of the tow vehicle, so I believe the WDH is set up correctly.
I didn't get the Dexter EZ-Flex equalizers because of the cost. Would they help with the porpoising? Do the wet bolts increase porpoising?
Thanks!