These are the correct ones, if they are true to the part number in the BSA service bulletin someone else posted you.
By all accounts they are an improvement, though give faster wear. This will also depend on your lining.
The 8" half width brake as fitted to BSAs both unit and twin was by all accounts better. Otherwise the gentleman who has shown how to mod a TLS set-up by shaving your brake plate support castings is another way to go. If set up correct, the TLS is quite good.
Cars in those days all had drum brakes and not very good ones. Nowadays every one has ABS and can stop in 15 feet at 30 mph, so you just have to give a wide margin of error when riding.