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Divine 59 · 05-12-2024, 10:56 PM

Hello STP67-72, do you still have the GMC 270? If the answer is "yes" can you give more information about the transmission? It is described as a 4 speed. Is it a SM420 4 speed manual or a Hydramatic 4 speed auto?

Hope to come to terms on this engine.

05-12-2024, 10:56 PM	#2
Divine 59 Registered User Join Date: Sep 2011 Location: Austin, TX Posts: 307	Re: 1957 GMC 270 6 cyl and 4 speed Hello STP67-72, do you still have the GMC 270? If the answer is "yes" can you give more information about the transmission? It is described as a 4 speed. Is it a SM420 4 speed manual or a Hydramatic 4 speed auto? Hope to come to terms on this engine. __________________ My Build Thread http://s95.photobucket.com/user/drop...?sort=3&page=1