Talk to your club's boiler inspector – not only will they be experienced but also they are the one who will have to certify your completed boiler for insurance purposes.
In general most of LBSCs boiler designs can be certified with little modification, if any – However the contruction methods he suggested (eg the use of brazing alloys such as SifBronze or Silbralloy and the use of soft solder to caulk stays) in the magazine instructions are far more likely to need changing to meet todays boiler code. But it is your boiler inspector who is the guy to talk to.
If you are not yet in a club join one. It is worth it!
Edited By Nick Clarke 3 on 04/01/2019 08:26:22