Wow, Dan. Those pictures are above and beyond. ( Please tell me you didn't pull that off just to take those pictures)
Dimensionally in that picture, it looks like the overall length of the angle iron is about 9"... Is that close?
The blower was already removed. That tractor is also one of my summer workers. That's great that you were able to find some parts, aren't you glad you didn't just say what's this and throw them in the scrap pile.
A picture is worth a thousand words, so here you go....