'85 front will be 3" narrower than your '93 rear.
previous poster has some points, it will be a lot of cash to build it correctly however so are the 60's! What are you wanting to run? 37's or 38+? DD or trail only?
I have 37's, toys and I drive it, I have busted the inner and outer hub gear but that was warranteed...........(thanks Bobby) and that is it. Works great, doesn't stick out too far and has much better ground clearance.
If you run 60's and anything less than a 40" tire you have a rock anchor in my opinion. Toys have great clearance but they sacrifice in strength over the 60's. Now with Longs your axle strength is close to the 60 shaft so that is not as much of an issue.
all depends upon what you are wanting to build it for. I love rocks, so that is what mine is built for and it does awesome.