Just a response to your query about brake shoes; For the rears, assuming you have a 37 LaSalle or Cadillac (at least the 60 series), they are as near as your local NAPA auto parts store! The part number is either TS-33 or 41456 (both these numbers are on the box). Bring your old ones (one leading, one trailing) just to be sure, but evidently GM used these same shoes on a multitude of cars up into the 50's and I think they were even used on certain Jeep models up into the 70's. Just remember to save the box, because you need to return the old ones to get credited for the cores. Yes, believe it or not, these will go back to their brake remanufacturing unit in GA.
BTW, if you'll read the forum rules, you'll see that in order to post, you must include your full name or at least first initial and last name. So when you acknowledge this response, best to correct this or your post will be deleted.
Mark Lowery, CLC#25216