I am going to finish up this post by telling you what I did with the crack.
1 I sanded the plug to a loose fit.
2 put duck tape around the horn,but not covering the crack it self.
3 sanded inside of horn were cracked.
4 mixed up clear slow set epoxy.
5 smeared the epoxy in crack on the inside,and on the plug.
6 then inserted the plug,it was a very loose fit.
7 I then wraped bailing wire around horn,I tightend it just enough to close the crack.(the duck tape gave the wire something to hold on to).
8 Then positioned so the plug wouldn't fall out and let it dry for two days.
9 sanded off excess epoxy and put in the brass tacks.
10 smeared bees wax on the crack,just to make shure it was sealed.
If it should ever crack, I'll get some raw hide to rap around it, I do like that idea.
Thanks for the all help,
Kevin