Now if I don't mess this up here are your pictures and a rough blue print.
having some trouble pictures want to rotate for some reason so may be strange but you should be able to figure it out.
just used some material I had around the farm. I think the main beam was a old plow beam. have a shackle for lifting since the header is very heavy. a 120 hp squats down when you lift it. blue print a little hard to read so here are the numbers. overall length is 39 1/2", beam is 3"x 1 1/2". from end to center of bottom pipe is 2 1/4 ". from end to center of top pipe 10 1/2" and end to center of shackle hole is 37 1/4". if you need more pictures or info let me know.