Virginiafiretruck, I'm in kind of the same boat with the 1960 Apache 30 I purchased.
I thought I had a 235 in it and after looking at numbers today and then doing some reading this evening I believe that I too, have a 261.
I'll look again tomorrow when I have more light in the engine compartment.
From this thread on fan sizes I measured the one on the engine and it shows 19 inches?
I'm not sure whether I should be happy or not. How about you?
