I'm building a new stand to replace my off kilter stand of 30+ years. I used 2 - 3' and 3 - 2' pieces of 1 1/2" x 1/8" thick square tubing, 4 wheel plates and 4 330lb wheels from my favorite Chinese tool supply. I made 12 gussets from 1 1/4" square tubing 10" long ( 1/4" plate can be used for gussets). The axles are 2 - 6" x 3" diameter pipe and 2 - 10 x 2 1/2" diameter pipe. The mount plates can be started with a 2 - 5" X 8" - 1/4" plates and cut down from there. The axles are cut at a 45 degree angle and centered between the middle cylinders.To center the mount plate I measured 5 3/4" from the center of the forward mount bolt and made a center line for the axle. Tack weld these and find a motor or block and bolt it to the stand and make any necessary adjustments to square the block. With the plates welded and trimmed and the block level in the stand, drill a stop pin hole, the cut a ring from the 3" pipe and make an axle retainer for both sides. Rotate the block, drill stop holes at verticle, upside down and nose down. I like this stand because I can drop a cam straight down into the block, and bolt a flywheel,clutch and bell housing to it. Different axels can be made for other engines as long as the stand is made wide enough for them to rotate.