I am planning on swapping the rear discs out for drum brakes.

Should I get rid of the mastercylinder and power brake booster also?

I have the 11.75 disc mopar upgrade up front so if I go with the 11 inch drums out back will that cause problems?

Are the parking brake cables the same for 11 inch drums and 10 inch drum cars for 68-70 B-body?

And are 11 inch drum parts available over the counter at parts stores?

If you have some tips for the swap and know something that I may be overlooking please chime in.