I found a thread that talks about what to buy and how to make them work here: http://www.jalopyjournal.com/forum/...y-parts-reproduction-parts-list.331564/page-3 Hope this help you. Glenn
Seems like I was told eons ago that some F100 drums are the same as Merc. Don't buy 'em on my suggestion, but does anybody know for sure?
It uses the same brake shoe as a 48-52 F1 & 53-66 F100. Do you have a drum to compare it to? If the bolt pattern and the overall depth of the drum was the same as one of the two (F1 or F100) it should work.
You might try Concours Part for the brake drums they list drums for '49 thru '59. I've gotten parts from them and they seem to know what they are talking about and have always been happy with their parts. Call them and ask 800-722-0009. They are in Carson City, Nv and shipping seems a little slow to the midwest. Good Luck