I have made several also. 1 3/4" will work ok on a "T" bucket or similar car. I like the look of 2" better tho. Use .250 wall and you can bend it in a regular pipe bender. I have one similar to what Harbor Freight sells. Bought mine thirty years ago for about four times what they get now!

IF you can find them, use early Econoline spindles, trim the arm, and they are compatible with disc brakes and regular Ford wheel bearings. King pin kits are getting hard to find tho. Got a couple sets off Ebay.

The axle on my daughters bucket, I used shortened 49-54 Chevy spindles, modified VW rotors and old Vega calipers.

If you draw a line down the tube for reference the bends will come out perfect. Then I chuck the bent tube into a fixture on my mill table (made from an old econoline axle end) and cut the kingpin boss angle with a milling cutter. Weld on the bar stock ends, drill and ream the holes for pin and lock.