I am using a Nova from ~70 I think, don't remember which year exactly. I picked one that worked for drum/drum that had the same form factor as a same year car that had disc/drum just in case I wanted to upgrade in the future.
Rock Auto had it for under $35 . . .
I adapted the original mount to carry this MC - I wanted to be able to fill it from the same hole in the cab floor as stock.
I used a bandsaw to section the original mount to pull the stock cylinder mounting surface in to make room for the wider Nova cylinder - then I used a piece of 3/8" thick flat bar to create an ear for the Nova cylinder to mount to and then welded it all up after making sure the push rod was in proper alignment. Only took about 4 hours to make the mount using scrap that I had laying around.
