SM420 is the correct 4-speed for a '49 but also could have been original in a '63 to '67 where that motor might have been found.

Last edited by OldSub; 02/19/2008 3:42 AM. Reason: Fixed bad info.

1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
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