It doesn't have to Specifically for a 360. The brackets are the same for the 304 and 401.
I wouldn't go as far as saying the aluminum doesn't hold up. I have 4 AMC V8 engines 2 304's and 2 360's the factory PS brackets are holding up well. I'd say its more of the care they get from the owners, than the part failing.
Sorry none are for sale.
1957 WILLYS pickup, needs work.
1973 J 4000,
1978 CJ7 DD.
1979 CJ7 360, TH400/Quadratrac trail Jeep.
1980 CJ5 trail Jeep.
1983 CJ7 pretty weekend and sometimes to work Driver in the summer, My first rebuild, if the Q-trac and 5 are broke, this one is the one to take. its just as capable as the other 2, except nice paint.
1984 Grand Wagoneer, 1 ton axles, great 360/727, and a big a$& tree fell on it .
1989 YJ the CJ to YJ conversion.
2005 TJ Rubicon.
2011 Grand Cherokee Laredo 4x4, Mrs. LUCDOG's DD.
Lots of parts not for sale, i'm a hoarder.