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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: Apr 2005 Posts: 242 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 242 | As the title says. Thanks for your help!!!
Marv.
Last edited by marvin ribbich; 10/28/2020 10:42 AM.
| | | | | Joined: Feb 2016 Posts: 1,996 'Bolter | | 'Bolter Joined: Feb 2016 Posts: 1,996 | Any Chevy V8 will bolt up, you need the correct bell housing to match the SM420, mine is the original 283 V8 and SM420, all of the Chevy V8's have the same bolt pattern for the trans/bell housing - even my 2000 K3500 6.5 diesel is the same.
Last edited by 78buckshot; 10/28/2020 11:59 AM.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
| | | | | Joined: Nov 2005 Posts: 6,101 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,101 | Hy marvin ribbich, as 78buckshot has said it is more a matter of having the correct bellhousing to mate any engine to any transmission. In the mid fifties heavier trucks manufactured by Chevrolet and GMC could come equipped with Buick, Chevrolet, Oldsmobile and Pontiac V8 engines As the mounting bolt pattern of the SM420 transmission is shared by many transmissions I would think that there are many non GM engines that could have an SM420 transmission bolted up to them. Hope that helps. | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Also all GM inline 6 cyl. Engines. Some BOP bellhousings come with 420 bolt pattern.
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: Nov 2020 Posts: 4 Moderated | | Moderated Joined: Nov 2020 Posts: 4 | Will a 1966 gmc k1000 v6 305e bell housing bolt up to a SBC. Try to convert my v6 to a 350. And add power steering | | | | | Joined: Feb 2004 Posts: 29,881 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,881 | No, the V6 bellhousing bolt pattern is different than the V8's. You might have one of the "SAE" style round bell housings on the 350, depending on which transmission you have. There are SAE bellhousings that fit the GM V8's which would adapt them to your transmission, however. Your checkbook is going to need some CPR- - - - -they're scarce and expensive!
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: Nov 2020 Posts: 4 Moderated | | Moderated Joined: Nov 2020 Posts: 4 | Thanks I have read various articles both ways saying yes and no. My v 6 bell housing is rounded and has the 11 inch clutch, and the transmission is the SM 420 manual 4 speed. Do you know what SAE bell housing I would need and if I can get that housing would the rest of the drive train bolt up, and can I use my original fly wheel | | |
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