Yours likely has a Harrison R4 (round pancake), which was also used in 1980-90's Chevy, so will be easy to source. It is hard to design a Sanden bracket, given the cantilevered mounting points. I had one on my 1985, but it cracked in several places after ~3 years. Look for an R-4 w/ O-ring grooves on the same level since probably seal better and the "seal rings" are confusing and harder to source. I wouldn't change it until it fails (usually by seizing on a hot day, are yours 108 F like today in Sacramento?). I have Hella PAO 68 oil in mine, which is claimed to work better (ref Duracool's "Oil Chill" marketing).

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans