Jon,

Thanks for the additional info. I have a couple 216's I am considering freshening up and I am out of carter yf's. (makes it sound like I do this a lot) and was thinking about using W-1's. Both had rochesters and both later than 1950. Did the 747 have a larger throat, base and manifold for a 235 or were the changes only internally to the engine?

1946 1-ton Panel
1952 1-ton Comml. W/Grain Body