71 Swinger Drum Brakes - 9 or 10"?

[FastbackJon]

My '71 Swinger 225 has drums all around.

I didn't see any 10" option on the fender tag, so should I just assume that 9" were more common and that's what my car has?

 

[scampy72]

if its an origional slat six then they are most likely the 9"ers.

 

[yellowdartdave]

Simple.....
Slant 6...9 inch
V8.......10 inch

http://www.hamtramck-historical.com/images/dealerships/DealershipDataBook/1971/71_Dart_Demon0012.jpg

 

[FastbackJon]

Thanks, you guys are quick and great!