I think I need to be more helpful , If ya need to make them. 1st step measure the distance from frame to frame.2nd step,measure distance from bolt hole to bolt hole on your engine,then just do the math to get the holes centered properly. I would drill the holes an 1/8 th of an inch bigger than what you actually need them to be so that you have a little room to play with. to get the 1/2 inch steel to make them out of ,go to a machine shop where they usually have scrap material from other jobs that they got laying around,and can be bought fairly cheap.If ya dont have a welder,I would hunt around for something like a muffler shop where the guy is self employed and would appreciate the business,that would be the place to get it welded togeather at a reasonable price. Inspect the welds to make sure that there is good penetration into the metal[you dont want any weak welds] looking at the weld , you want to see at the edge of the weld an indent on the piece being welded,thats called a hot weld and you have good penetration.if you dont see that indent, the welder was not turned up high enough and the molten metal from the welder is just lying on the surface of the material and isnt worth nothing,[thats called a cold weld] this is very important since you aee going to have a lot of weight on this. Hope I was able to help ya a little.