Last year, I almost gave up on finding a good solid rebuilder 261. In a last ditch effort, I looked one day in ebay and found one an hour up the road (Marysville Washington), complete long block and stock bore too, even had the larger correct rochester B carb. I've been buying lotto tickets since to no avail, but I did get lucky once so keep looking.
Steve
1953 Chevrolet 3100261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
In the DITY GalleryVideo of the 261 running1964 GMC 1000305 Big Block V6, sm420, the next cab off restoration