RE: Rear Exhaust Engines
Rear exhaust engines come in all sizes from .15 through 1.40. K&B, Rossi, Picco, O.S., Webra, MVVS, Jett, etc., all produce engines in this configuration in various sizes. I have in my drawr or closet an O.S. .25 and .40 as well as a YS .60, all of which are rear exhaust.
John