I have noticed that my 261 is more agreeable to shifting into a higher gear before sufficient road speed. I loved my old 235 but the whole truck would shudder if I did that until I got the road speed and RPM's up. And I have a longer 4.10 rear-end now instead of the old 4.57.

I wouldn't go nuts in buying a 261 but GM and I think they are worth it.

Of course, I had the Carter W-1 on the 235 and have a Rochester Monojet on the 261.


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.