you could fit an elite 250 engine in it but 55 is about tops for for elite 250. If you go over to yahoo groups there is one that deals with 125 and 150. Nice find worth about 1300.00 to the right person. Stock air cleaner is something that can be changed out. You could cut your own wind screen out of Lexicon plastic.
Life's journey is not to arrive at the grave safely in a well preserved body,but rather to skid in sideways totally worn out shouting WHAT A RUSH, WHAT A RIDE.
"Life is a tragedy when seen in close-up, but a comedy in long-shot." Charlie Chaplin