I picked up the cylinder from a Model 213 Alpina 350 off E-bay, which fits my M143 360 Frontera bottom end. I’d picked up a Husqvarna 125 cylinder head about 2 years go, just in case I might be able to adopt [i.e., steal] “Snarly” John Miller’s Husqvarna concentric combustion chamber mod. John says that there’s definitely machine work needed to make it fit, but nothing too major or scary.
John’s Metralla a few years ago, with Husky head
I have also purchased a new Airtech Reed-Titan seat base, and a used BSA OIF export tank, but they haven’t arrived. Both of them should be here by the end of January. The tank is rusted, dented, bondo’ed and frankly pretty crappy-looking. We’ll have to see if it is worth using once it gets here, but I was equally nervous about spending twice as much on a new Indian knockoff tank. Time to get a big electrolysis tank going, I guess!