Folk are always looking for a good 261, which readily interchanges with a 216 or 235 in an older car or truck. They are, in fact, becoming rather expensive.
An advertisement on this site or in the *12-Port News* could get a good price or a good-running 292 for that 261. The 261 is a fine engine for its era, but it is no match in a later truck for a well-prepared 292, and the parts for the 292 will be less expensive and easier to come by--more power and more torque for less money and sweat, and the 292 offers more main bearings and greater potential for longevity as well as development.
For a Chevrolet car or truck made before 1963, the 261 is a wise choice. For vehicles made after 1962, the 292 makes far better sense.
God's Peace to you.
d
Inliner #1450