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| | | | Joined: Jun 2021 Posts: 105 'Bolter | | 'Bolter Joined: Jun 2021 Posts: 105 | I posted a request for a flywheel for a GMC 270 in the parts wanted section. However, I have found over many years that they are hard to find.
Has anyone found a flywheel for another engine that will work for a GMC 270?
Thanks!
1950 GMC 100 Panel Truck, 1958 270, 3-spd Saginaw with BW OD, 3.73 12 Bolt Differential from a 1966 C10, Front Disc Brakes Hill Holder Bought it in pieces 9-1976, driving since 6-1978 Follow in the DITY | | | | | Joined: Feb 2004 Posts: 29,837 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,837 | Since a 216/235/261 bellhousing will bolt onto a GMC engine, and the starters will interchange, it might be possible to redrilll a Chevy flywheel to fit the GMC crankshaft bolt pattern. Is your crankshaft the 4 bolt or 6 bolt type? I have both types of flywheel on hand (Chevy and GMC). I can make some comparison measurements if you like.
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!
| | | | | Joined: Oct 2018 Posts: 118 'Bolter | | 'Bolter Joined: Oct 2018 Posts: 118 | Please recheck your post, or pm me. | | | | | Joined: Jan 2022 Posts: 2,478 'Bolter | | 'Bolter Joined: Jan 2022 Posts: 2,478 | Robert's 270 is a late model which has a 6 bolt flywheel.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
| | | | | Joined: Jun 2021 Posts: 105 'Bolter | | 'Bolter Joined: Jun 2021 Posts: 105 | My truck had a 235 in it when I bought it in 1976. I found and installed the 270 around 1979. I could not find a flywheel then, so I had the 6 bolt pattern machined into the 4 bolt 235's flywheel. My flywheel is still installed, so I am not 100% confident of my measurement of the bolt circle diameter, but I believe it to be 4-1/16". It is a 168 tooth ring gear.
1950 GMC 100 Panel Truck, 1958 270, 3-spd Saginaw with BW OD, 3.73 12 Bolt Differential from a 1966 C10, Front Disc Brakes Hill Holder Bought it in pieces 9-1976, driving since 6-1978 Follow in the DITY | | |
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