[curmudgeon]

From a strict cost/benefit analysis: 5K mile 235 vs rebuilt 261, the answer is probably no. There is not much of a market for used 235's except for period stock rebuilds, but the shipping from your location would be expensive unless you find a local buyer. However, you already expended the time/cost in acquiring not 1 but 2 261 blocks plus you stated in post #5 you're not doing this with cost in mind. I am happy with my 261, you are minimizing your expense by bringing the engine in for professional machine work but you are doing all the install and dialing in yourself. Hope to see you continue with the rebuild and to enjoy the increased torque.