glennj3 ,
Why not do this the easy way .
There's a real nice set of GM NOS brake shoes on ebay .
The price is $44.95 or BEST OFFER .
GM part # 3703513
Go to ebay & type in the search box...........3703513
Then there's no more debate over woven lining material , rivets , size , etc .
You are making this way to complicated for yourself ............IMO .
PIC
https://i.postimg.cc/76Zr7BwT/3703513-Brake-Shoes-NOS.jpgYou can probably get the whole set of ( 4 ) shoes for $40.00
The made in china after market brake shoes are probably more than $44.95 or best offer .
I would not recommend junk yard brake shoes .
G.