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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: Sep 2012 Posts: 11 New Guy | | New Guy Joined: Sep 2012 Posts: 11 | It's a pre 86 chev 350 just wondering if it will bolt up to the 4 spd Muncie? Or would I have to do an adapter plate? | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | You'll need the correct bellhousing, as the 6 cylinder bellhousing will not work with the V8. The bellhousing you'll nedd is be either the '55-'59 V8 or '63-'72 I6 or V8. You'll also need to either modify the corssmember or swap it out to allow for proper mounting, as the SM420 does not have a trans mount provision.
Bill Burmeister
| | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | The bolt pattern a SM420 uses started in 1948 in trucks. It is the same bolt pattern passenger cars started using in 1955, if that helps.
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