Hi Rispony,
Thanks for the kind words. I did completely rebuild the suspension. The springs were completely worn out when I bought the trailer. I was lucky to find a new heavy duty aftermarket axle with hubs at the same time I found the trailer. The axle had the correct hubs to fit the 5 on 4-1/2" pattern on the Jeep.
I bought new old inventory military springs. They were fine and just needed a little modification and paint. The M416 springs are the same as on some early model Jeeps. I bought new pins and shackles from J.C. Whitney.
When I mounted up a set of used BFG KM2's onto the old wheels that were on the Jeep when I bought it the tires came pretty close to the frame on the trailer. With the new Interco Bird Dog wheels that I have on the Jeep the wheels and tires fit much better and provide at least 1" of clearance. I ordered the Bird Dog wheels with less offset as I like a wider stance on the Jeep.
I've seen quite a few builds of M416 trailers where they did spring overs. I could be wrong but I don't think it's completely necessary and I would rather keep the center of gravity as low as possible. By building the fenders with 35" tires in mind I don't have to do a spring over to clear the stock fenders.
I haven't mounted the fenders yet but they should have sufficient clearance. The top of the fenders will line up with the line where the body starts to flare out. This still allows room to access all of the tarping lash points.