Soldering, done well, with a good quality 60/40 rosin core solder will get the job done. A proper wattage soldering iron, or a gun of your choice will also work well. Just do some practice work first and learn to control the heat, much like in welding. For instance, if you linger too long, and...
This also reminds me of a article I read in the Hagerty newsletter a while back. There was a fellow/company named Smith back before WWII that took 4cyl model A engines and made a special head for them. It basically created a two cylinder engine driving a two cylinder compressor. The company was...