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V6 Big Block


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TravisH
User

Nov 2, 2016, 9:49 AM

Post #1 of 13 (382 views)
V6 Big Block Sign In

I was wondering if anyone is familiar with what I believe is a a 305 V6 big block? The first time I ever saw one was in a 1967 GMC and wasn't to sure what I was looking at first thought was 402 till noticed the spark plugs weren't in the usual place but were up by the intake manifold. The man selling it was a rare pick-up I didn't about that could be but found it interesting for sure. Let me know if any off you are familiar with this engine.

Thanks;
Travis


Tom Greenleaf
Ultimate Carjunky / Moderator
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Nov 2, 2016, 11:04 AM

Post #2 of 13 (374 views)
Re: V6 Big Block Sign In

1967 - right? It's either totally custom rare or someone stuck some other engine in it. I can think of any "V6" engines for a GMC anything they were all "I-6" means "in-line" or a ''straight" six if a six cylinder.


Didn't call sixes big block or not that I recall for six cylinder GM engines in 1967,


T



Hammer Time
Ultimate Carjunky / Moderator
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Nov 2, 2016, 11:49 AM

Post #3 of 13 (371 views)
Re: V6 Big Block Sign In

Yep, they only had 230 and 250 inline 6's.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



TravisH
User

Nov 2, 2016, 1:09 PM

Post #4 of 13 (363 views)
Re: V6 Big Block Sign In

I did a little research GMC built these V6 engines in different engines displacements in gas and diesel for there standard trucks from 1959 through 1969. This was factory unmolested original 1967 don't think too many are familiar with these this was my first.

Thanks;
Travis


Tom Greenleaf
Ultimate Carjunky / Moderator
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Nov 2, 2016, 1:32 PM

Post #5 of 13 (362 views)
Re: V6 Big Block Sign In

What model do they call this thing? GMC is still a Chevrolet really just another name.


If this truck (they didn't make cars) was a custom made order by an executive to be different they did do such things, one of a kind and most collected and never so much as wet once released no use really at all if rare enough.


Other than that I can't think of any V6s for GM anything till later. Might be just me but never called V6s big or small blocks in anything. All V8s - any GM got named big or small block.


Possible - yes. Likely NO! Not trucks but have seen a 1972 Buick Riviera both hood and trunk had the "boat-tail" one made and real I saw it myself from the Domino Pizza founder's collection in Maryland then when he got out.


People who have such things don't guess they can prove it without doubts, serial #s and marks it wouldn't have otherwise or the thing just has something thrown in and you don't know what?


Tom



Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Nov 2, 2016, 1:53 PM

Post #6 of 13 (360 views)
Re: V6 Big Block Sign In

History
Some of the first V6-cars were built in 1905 by the Marmon Motor Car Company.[2] Lancia V6
The first series production V6 was introduced by Lancia in 1950. Other builders soon started using V6 engines. In 1959, General Motors built a heavy-duty 305 in3 (5 L) 60° V6 for use in their pickup trucks and Chevrolet Suburban. The engine was later enlarged to 478 in3 (7.8 L) for heavy truck and bus use.
In 1962, the Buick Special offered a 90° V6 with uneven firing intervals. Consumers did not like this engine because of the vibration.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Double J
Veteran / Moderator
Double J profile image

Nov 2, 2016, 3:37 PM

Post #7 of 13 (355 views)
Re: V6 Big Block Sign In

Way back in the early 60's when I was a kid working at my dads shop , my dad had a couple GMC Tow Trucks with the V6 engine.
Click


Click


TravisH
User

Nov 2, 2016, 3:43 PM

Post #8 of 13 (354 views)
Re: V6 Big Block Sign In

This old GMC came from Tyler Texas read this dealers engraved insignia badge. When I saw it was sitting on a lot that sells old cars and trucks. It's long gone now and needed a lot of work and sure didn't need another project that's why I didn't buy it. Just thought the engine was interesting and thought I would ask and see if anyone remembered these engines or worked on them. As Hammer Time found other manufactures that manufactured V6 even earlier the one I saw. Detroit diesel made a V16 which were 2 V8 8V-71 or 8V-92 series saw on when working for diesel shop.

Thanks;
Travis


Double J
Veteran / Moderator
Double J profile image

Nov 2, 2016, 3:50 PM

Post #9 of 13 (350 views)
Re: V6 Big Block Sign In

Yep, aware that others made them earlier
Just tossed in my 2 1/2 cents because you had asked if we were familiar with this engine
First Tow Truck I ever drove , it was a workhorse, had a lot of grunt.....


TravisH
User

Nov 2, 2016, 3:52 PM

Post #10 of 13 (348 views)
Re: V6 Big Block Sign In

They were kind of neat looking weren't they it left me scratching my head when I first saw one in person at first didn't know what I was looking at. They were pretty good sized engines.

Thanks;
Travis


Double J
Veteran / Moderator
Double J profile image

Nov 2, 2016, 3:58 PM

Post #11 of 13 (345 views)
Re: V6 Big Block Sign In

Yeah it could take a beating.....
Dads shop had over 25 guys ,most drove the trucks. they were hard on em but the trucks held up .


TravisH
User

Nov 2, 2016, 5:50 PM

Post #12 of 13 (335 views)
Re: V6 Big Block Sign In

The engine looked like it had long stroke with that wide v configuration block so it would make it a good candidate for hauling pulling such as a tow truck.

Thanks;
Travis


TravisH
User

Nov 2, 2016, 8:15 PM

Post #13 of 13 (330 views)
Re: V6 Big Block Sign In

Those web sites you referred me to on GMC V6 engines was interesting and a lot of information. Thankyou, for sending that always wanting to learn something new.






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