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#1
April 30th, 2016, 06:57 PM
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Twin Six
From Hemmings yesterday:
"A more typical cabover engine choice might be the GMC Twin Six V-12 of the 1960s, one of the last attempts to wring as much power out of gasoline engine packaging for big trucks before the era of diesel took over. Mac’s Motor City Garage has more on the unusual engine." http://www.macsmotorcitygarage.com/2...ubic-inch-v12/ Some of the comments below the article aren't too complimentary. Several good ones though, especially the one at the bottom from Zorba.
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Ed Snyder Medford, Oregon 1962 1000 Pickup 401M & Muncie 318 with overdrive 1962 K1000 Suburban 401M & SM420 1967 CM1500 pickup 351E & NP435 
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#2
May 1st, 2016, 04:30 AM
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Re: Twin Six
Good article, I am trying to learn as much as can about the 702. Do you know why the fan blades are not spaced evenly on the v12. Bob
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#4
May 1st, 2016, 05:33 AM
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Re: Twin Six
Bunch of idiots in the comment section, but some who actually saw the light. Love that last comment though.
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"Excuse the rust I use my truck" 1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. 1964 Chevy C20 292/SM420 1966 Chevy C10 292 hotrod 6/TKO600 My youtube channel aka Military Chevy: To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
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#5
May 1st, 2016, 03:28 PM
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Re: Twin Six
I have seen a lot of info that 702 was made from 60-65, this article says it was made until 67, does anyone have any input. I have 702's with intakes dated 67, but exhaust manifolds and vin numbers point to 1964.
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#6
May 2nd, 2016, 01:00 AM
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Re: Twin Six
many fan blades are unevenly spaced. this is so the air doesn't cavitate, letting the blade get a bigger bite of air.
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