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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Feb 2005 Posts: 531 Shop Shark | | Shop Shark Joined: Feb 2005 Posts: 531 | Can I put a carb for a 250 on my 235???? | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | If the 250 carb is off a 67 on back (model B)it should fit with possibly some minor modifications depending on the year. 68 up used the Mono-jet. It could probably be made to work but would require some enginering.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Nov 2002 Posts: 2,763 Carburetion specialist | | Carburetion specialist Joined: Nov 2002 Posts: 2,763 | For best results migrating O.E. carburetors:
Generally, an O.E. carburetor may be migrated to a similiar engine/transmission/vehicle with an engine displacement within 3 percent of the original engine.
3 percent of 250 CID is 7.5 CID. 250 CID - 7.5 CID is 242.5 CID. The 235 does not fall in the range.
This does NOT mean you cannot make the switch, but results may be less than desired.
Jon.
Good carburetion is fuelish hot airThe most expensive carburetor is the wrong one you attempt to modify. If you truly believe "one size fits all," try walking a mile in your spouse's shoes!The Carburetor Shop | | | | | Joined: Feb 2005 Posts: 531 Shop Shark | | Shop Shark Joined: Feb 2005 Posts: 531 | Thanks guys... came across this NOS carb (still in the box) and thought I'd check... | | | | | Joined: Feb 2006 Posts: 395 Shop Shark | | Shop Shark Joined: Feb 2006 Posts: 395 | heck if it,s cheap try it...doc | | | | | Joined: Nov 2002 Posts: 2,763 Carburetion specialist | | Carburetion specialist Joined: Nov 2002 Posts: 2,763 | Doc - I would respectfully disagree. Rochester used components in this carburetor which are NOT compatible with modern fuel. Even if the N.O.S. carburetor is free, it will still require rebuilding (at least the accelerator pump, the fuel valve, and the gaskets will need replacing).
Jon.
Good carburetion is fuelish hot airThe most expensive carburetor is the wrong one you attempt to modify. If you truly believe "one size fits all," try walking a mile in your spouse's shoes!The Carburetor Shop | | | | | Joined: Feb 2005 Posts: 531 Shop Shark | | Shop Shark Joined: Feb 2005 Posts: 531 | I posted the question originally working from memory because I had misplaced the piece of paper with all of the specs on it... Actually, the NOS carb is for a 1955 265 which I understand will definately not work on my 235.
That's what I get for trying to bank on my memory (or lack thereof!)
If anyone's interested in this carb I can try and find out if it's still available... guy want's somewhere around $150....
AND I'm still looking for a NOS carb for my 235 (1960 engine)! | | | | | Joined: Nov 2002 Posts: 2,763 Carburetion specialist | | Carburetion specialist Joined: Nov 2002 Posts: 2,763 | Larry - give me a call during normal telephone hours.
Jon.
Good carburetion is fuelish hot airThe most expensive carburetor is the wrong one you attempt to modify. If you truly believe "one size fits all," try walking a mile in your spouse's shoes!The Carburetor Shop | | |
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