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Jul 21st, 2025 | | | | Joined: Jun 2015 Posts: 201 Shop Shark | | Shop Shark Joined: Jun 2015 Posts: 201 | Ok doing a motor swap in my 41, replacing the busted 216 with a 1961 235, what clutch and pressure plate do I need?
Also my old 216 had the W1 carb it that I put a rebuild kit in a year ago, but the 235 has a Rochester on it, which carb should I use? | | | | | Joined: May 2005 Posts: 8,988 Sir Searchalot | | Sir Searchalot Joined: May 2005 Posts: 8,988 | You need a clutch and pressure plate that fits the motor and it's bell housing...... and whatever transmission you are using. Hopefully the clutch linkage will hook up. Either carb is a good carb. | | | | | Joined: Mar 2005 Posts: 146 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 146 | The 216 carburetor will not mount or work properly on the 235 engine. The mounting holes are different; 2 11/16 inches center to center on the 216 vs 2 15/16 center to center on the 235. Throttle bore and venturi are also smaller on the 216, which would negatively affect performance. You will have to use the Rochester that was designed for the 235 engine.
As for clutch and pressure plate, the same size (the one you have) will fit both engines. | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Clutch and pressure plate fit whatever flywheel you choose to use.
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Sep 2001 Posts: 29,262 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,262 |
You should/might want a flywheel that will match teeth on your starter (6v or 12v).
You need a matching clutch assembly that will bolt to your flywheel bolt pattern/diameter: clutch, pressure plate AND throwout/release bearing.
| | | | | Joined: Jul 2010 Posts: 592 Shop Shark | | Shop Shark Joined: Jul 2010 Posts: 592 | 1961 235's came with two different size clutches and pressure plates, 10" and 11". The flywheels are different.
Matt | | | | | Joined: Jun 2015 Posts: 201 Shop Shark | | Shop Shark Joined: Jun 2015 Posts: 201 | I'm using the flywheel off my 216 cause the 235 didn't come with the bell housing or anything | | | | | Joined: Jan 2001 Posts: 5,320 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,320 | A 1941 flywheel is not a good fit. It uses 3/8" mounting bolts and has a larger center hole to pilot on the crank. I have seen where the bolt holes were drilled out for the 7/16" bolts, but the center pilot hole being to large is still in question... I know the three dowels will in theory keep the flywheel centered, but I wouldn't do it, unless that is your only option.
Any 1942-62 flywheel will fit. Just be sure to get one drilled for the clutch size you want to use.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Mar 2005 Posts: 146 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 146 | Something else to consider if you are looking for a newer flywheel; 1942-1954 flywheels have 139 teeth and were designed for 6 volt starters only. The 1955-1962 flywheels have 168 teeth and will work with 12-volt starters only. Starters and flywheels cannot be mismatched or they will not mesh properly. Also a non-stomp car starter will not mesh properly (stomp starters were used in trucks thru 1959).
If your truck has been converted to 12-volt system, it can spin the 6-volt starter with no problems as long as the starter is connected to the correct flywheel. | | | | | Joined: Jan 2001 Posts: 5,320 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,320 | Good point about the difference between 6 and 12 volt flywheels.
One correction on the last post. Flywheels are the same for stomp and solenoid starters.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Jun 2015 Posts: 201 Shop Shark | | Shop Shark Joined: Jun 2015 Posts: 201 | The old 216 is a 50 model it's newer than the truck, also I'm on a 12 volt system but still using my 6v starter | | |
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