I've done both baffle kits and didn't find the older set that confusing. I had to modify the old set to fit on an O-290, which is different than an O-320 or -360.
The new baffle kit I installed went on an O-360 and since I had done the older kit, it was pretty straightforward. The new style kit has better instructions and CAD drawings rather than some copies of a copy of a copy of some old hand drawings. If you can read a drawing, which by the time to you get to this point you can, you won't have a problem with the older baffle kit.
I would disagree with some of these.
1. Yes, on the
angel on the vertical corner by the #4 cylinder.
2. Yes, on a
brace from the right side of the oil cooler to a stiffener on the side baffle of the #4 cylinder. (Disregard the nyloc fastener, that was changed before the first engine run.)
3.
NO on any brace that spans more than one cylinder or goes from a cylinder baffle to the engine case. The cylinders are not part of the case and move around a good bit so anything that ties one cylinder to another or from one cylinder to the engine case has a good chance of experiencing cracking issues. (Note, fiberglass plenums give enough that they do not experience this problem but I have seen aluminum plenums with cracks.)
If you go with #1, which I like much better than the other options, you will have to file down the corner of the angle aluminum so it nestles in the corner of baffles. Not a big deal but something you will have to do.