As seen above, I took the top piece of steel and welded it into the horn. Brazing was used to smooth out the transition on the sides where the horn met the bracket. After that, I cut out a piece of .040 sheet steel into the base size. Hope to weld this next time.
Here's a picture of the upper horns. Notice that their angle and length are different. The lower horns are 12 degrees of sweep and the upper ones are 25 degrees. Thanks to Paul Daugherty for explaining this one!
More to come this weekend.