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| Re: [GMCnet] Off-topic (sort of ) GMC V-12 engine [message #83401 is a reply to message #83299] |
Thu, 06 May 2010 20:44   |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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So what trans bolt pattern does this beast have????? Not sure how practical or where you would put the radiator but it would probably match bragging rights with twin turbo caddys.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: [GMCnet] Off-topic (sort of ) GMC V-12 engine [message #83433 is a reply to message #83299] |
Fri, 07 May 2010 03:08 |
Richard Brown
Messages: 281
Registered: May 2009
Karma: 1
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No real idea, but from the video it appears to be a Chevy pattern. Another name for the engine was "Twin Six". GMC made a 345 V-6 back in the early '60s (My father had a 1963 1-ton truck that had one). It had incredible torque at low RPMs. I recognise the valve covers on the 701. It had a 1-barrel carburetor that my dad replaced with a 2-barrel Holley. The spark plugs were in the intake side of the heads. The engine was based on the 409 V-8 built around the same period. If my memory serves, 409 pistons were a direct fit. When he sold the truck, the body was falling apart, the trans & rear end were loose & the front end was shot, but the engine used no oil to speak of (less than a quart between oil changes) and would always start up quickly hot or cold. He worked the truck to death, but the engine seemed to thrive on it. If the Twin-Six was half the motor that the 345 V-6 was, it was a fantastic motor.
Here's a video of a GMC 7000 series truck that the 701 was normally found in; http://www.youtube.com/watch?v=qjw3W0Ml9yA
Richard & Carol Brown
PO Box 941
Lindale, TX. 75771
1974 GMC Eleganza SE (DILLIGAF)
wings77sporty@sbcglobal.net
(903)881-0192
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Richard & Carol Brown
1974 Eleganza SE
1174 Hickory Hills Dr.
Murchison, TX. 75778
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