I replaced my 235 with a '61 261 and really like it. I used an 848 head from a 235 so holes were drilled in it to match the extra water holes of the 261 block. I stayed 6 volt so had to drill new holes in my old generator bracket to match the mounting holes on the block. All in all, a pretty easy swap.
1948 3/4-Ton 5-Window Flatbed Chevrolet 34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.
