Quote:
Originally Posted by AZKen
Will a SM420 from a GMC 305 V6 bolt to a 48-54 228 motor and bell housing?
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SM420 from the GMC 305 V6 should bolt up to your 228 engine with no problem. Even though there were subtle differences between GMC and Chevy Trucks made from '48 to '67, the SM420 was a standard issue GM Transmission for both GMC and Chevy Trucks.