Check this out -- maybe we can get Brian's friend to provide more details on this very desirable engine swap...
This is my pride and joy. It is a Allis-Chalmers 616 with a brand new Briggs & Stratton 20hp V-twin Vanguard engine. I had to put the 16hp Onan to bed for good. (So I guess you could call it a 620!) I have a friend who works at a local lawn & garden tractor shop and him and his co-worker decided to handle the task of finding a replacement motor and came up with this one. It turned out great! No cutting out of the frame or hood to make motor fit. My AC is back up and running and I enjoy it a lot. In the spring I want to put new paint on it, so we'll see what happens. I also have a 52" snow thrower for it too! Can't wait till this winter!
Click each picture for a closer view