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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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#53877 12/23/2005 7:27 PM | Joined: Sep 2003 Posts: 343 Member | | Member Joined: Sep 2003 Posts: 343 | Thanks Red58! Good site.
The SM420 is not synchroed for 1st and reverse gears, but 2nd-3rd and 3rd-4th are synchroed. You do sometimes need to double clutch even with the SM420 that has synchro rings.
1954 GMC 1/2-ton Longbed
1971 Pontiac LeMans Sport
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