A/C brackets what works with what years/vehicles

Hi everyone, I need a little information on A/C brackets, for small block Mopars.
What years work with what vehicles etc. I am looking for Small block AC Brackets that would work on my 81 Ramcharger. (I know it a bodies forum but I'm thinking Chrysler used the same brackets for all small blocks I'm just not sure what the changeover years would be and if I buy older style brackets would they work so long as I buy an older style AC compressor. Also what about magnum motors? They are a lot more prevalent in my area. Just grab the pulley system off a magnum truck and get proper compressor?
My RC has all the original AC lines and controls. A previous owner swapped the motor and must have thrown away the brackets. Thanks I think this is more of a small block question than a vehicle specific question. I've asked on a RC forum but have had zero response. Guess they're not all that popular.
Thanks for any help.
Cheers to everyone.
Can you show a picture of which style compressor you will be using? My Ramcharger is an 89 model year, I think. I will have to double check that. I will try to add some pictures of mine. This one is being replaced by a Magnum engine, serpentine system, and compressor so it is all apart right now but I took pictures while disassembling it.


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