Need rear brake drums!

Summit shows the finned Raybestos 2963R coming back into stock November 16th, for whatever that's worth

Brake Drums at Summit Racing

The non-finned version is in stock, Raybestos 2947R

1974 DODGE CHARGER Raybestos 2947R Raybestos R-Line Brake Drums | Summit Racing

They're both 10x2.5", 5x4.5" bolt pattern drums, the 2963R's just have the cooling fins. They're also quite a bit heavier. But if you need to get back on the road before they're available again the 2947R's will work.
Thank you. Just took a look. If I put in year, make and model it says the 2947R's (non-finned) don't fit. Wonder if I order them anyway in hopes that they do actually fit... I ordered a pair of Rayloc's from Napa too. This way I have a 2:1 shot that one pair works?