Well, I tidied up the shop a bunch and finally found the original mount for the snowblower engine. Unfortunately it's made of aluminum and can't be welded to the steel I have laid out for the build. But I have a big chunk of 4 x 3 tube that I can transfer the mount dims to and get it done.
Yea this one has a diaphram carb (or a airation carb as its labeled), got lucky that this engine is a techumseh (well, pre tecumseh, Before they bought out the people who made this motor)