Doug,
That's how I mounted my alternator!
Except I doubled the slide brackets, one in front and one behind the ear on the top of the alternator. I also used an attach point below the mag pickup to make it short and ridged (under the green throttle cable in your pic). The problem is the two ear alternator frame, which doesn't give very ridged mounting.
My lower alternator mount came from Pinapple Racing, and it needed some adjustment.

I bent it up to bring the alternator closer to the engine. Also something about the bolt diameter and the hole diameter being too loose.
Gotta love that Denso. I finally found one that has the power out stud straight off the back of the end bell.
I ended up with the oil cooler on the right side of the engine, and the air supply plenum had been rubbing on the alt output post.
For me it was neccesary to separate the air flow paths for radiator and oil cooler to get them to maintain temps in ground running.
I have a few pics on my chapter page, if you check out my link.
I have a Fred Breese mount too. A little tricky to mount my turbo, but I think it's a very good mount.
__________________
Scott Emery
http://gallery.eaa326.org/v/members/semery/
EAA 668340, chapter 326 & IAC chapter 67
RV-8 N89SE first flight 12/26/2013
Yak55M, and the wife has an RV-4
There is
nothing-absolute nothing-half so much worth doing as simply messing around with
Aeroplanes
(with apologies to Ratty)
2019