Engine has not been in a boat or running in the 38 years that we have had it. The carbs came to us broken from someone's careless forklifting, supposedly. Manifolds are in excellent condition, was a freshwater only use. Transmission has a plate on it that echoes the Model 135 and same S/N: G18265 and states: "with individual porting". I don't know who was the mfg of this trans...But I would like it all to find a new home where it can either be repaired and used or keep something else alive and kicking! Make me an offer. It is in the North SF Bay Area. Matthew 415.264.0830