I haven’t been earning my keep around here lately so thought I’d share a few pictures of what I believe is a original stock Rochester B off my ‘51 3600, 216 engine truck. It had documented 43,000 miles when purchased from a small museum back in 2013. The 261 Rochester is from a engine that was in a ‘59 wrecker. The owner pulled the good (?) 261 and installed a 327 many years ago. Bought it from his son 5 years or so ago.
Just looking, I can’t tell them apart. The easy tell is the 261 carb’s manifold mounting holes are about 1/4” wider. Also 50 is stamped on the 261 carb.
I’ll let the pictures do the talking. The 216 Rochester has the Id tag.
Dave, I see what you’re saying. When I look at image 6, the 261 carb in my opening post I see a a chamfer on the carb throat bore that's not on the 216 carb in image 7. It’s hard to see a difference in the power valve port locations. Curious.
Ron your images are not showing on my computer this morning but I don't think the carburetor on the 261 was the one made for that engine. At least based on what I saw last night. Somewhere I have an image of the one for the 261. Can't find it now but the bore was larger.
~ Jon 1952 1/2 ton with 1959 235 | T5 with 3.07 rear end
I just gave John a Rochester carb that I removed from a 261 engine, one that was used in a 1959 Chevy dump truck. The carb appeared to be the original one the truck was built with. IIRC, Rochester Bs for the 261 had a slightly larger venturi, and possibly a little bigger throttle plate than the one used on 235s. He should be posting a detailed tech tip on his evaluation of that carb soon. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
