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#1 |
Registered User
Join Date: Mar 2005
Location: Fairfield Maine
Posts: 1,759
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What is it and how does it work(pic)
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#2 |
Registered User
Join Date: Feb 2007
Location: knoxville tn
Posts: 1,013
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Re: What is it and how does it work(pic)
WOW kool motor . I dont know about that part but that motor looks kinda like a big block. the sparkplugs are in the wrong place lol could it be a kick down for passing gear on the t400
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nickle and dime |
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#3 |
Senior Member
![]() Join Date: Aug 2003
Location: Conyers,Ga.
Posts: 7,287
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Re: What is it and how does it work(pic)
Royo is correct.
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#4 |
Registered User
Join Date: Mar 2005
Location: Fairfield Maine
Posts: 1,759
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Re: What is it and how does it work(pic)
All t400 run this type of switch?
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#5 |
Sierra Grande Club
Join Date: Jan 2007
Location: New Mexico USA
Posts: 2,433
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Re: What is it and how does it work(pic)
That's the switch that activates the N2O.
+1 on the cool motor. s/t
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1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe. ![]() |
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#6 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: What is it and how does it work(pic)
all TH400's from 1970 and older used that, in 71 to 90-something, it was located on the throttle.
Just as clerification, so more ppl aren't misinformed, that isn't a 'big block'... it's just a V-6. |
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#7 |
Registered User
Join Date: Aug 2006
Location: Oklahoma City
Posts: 212
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Re: What is it and how does it work(pic)
nice motor i think this is the first time i seen a set of GMC valve covers looks like a keeper to me
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#8 | |
just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: What is it and how does it work(pic)
Quote:
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#9 |
I have a radical idea!
Join Date: Jan 2005
Location: Sweet Home Alabama!
Posts: 6,513
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Re: What is it and how does it work(pic)
Just FYI, V6's with auto trannys are pretty hard to come by. The transmission adapter, flexplate and converter are worth some coin. Did you ever try to get it running?
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'67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club! |
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#10 |
Registered User
Join Date: Mar 2005
Location: Fairfield Maine
Posts: 1,759
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Re: What is it and how does it work(pic)
This respones is for Longhair and Longhorn Man. I found this information on this website just for clarification... http://www.6066gmcguy.org
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#11 |
Registered User
Join Date: Mar 2005
Location: Fairfield Maine
Posts: 1,759
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Re: What is it and how does it work(pic)
67 c30 no i havent had her running but i did get her turning over,just no fire yet. i have another project going right now so time is limited.I swear someone on this site told me it was a big block 305e
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#12 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: What is it and how does it work(pic)
nope, that's a generic nick name chevy guys have given it. If you look at GMC lit from back in the day, it was neverr ever refered to as a big block.
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#13 |
Registered User
Join Date: Mar 2005
Location: Fairfield Maine
Posts: 1,759
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Re: What is it and how does it work(pic)
Did you look at the website?
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#14 |
Page intentionally left blank.
![]() Join Date: Jul 2006
Location: Laramie, WY
Posts: 299
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Re: What is it and how does it work(pic)
I don't know, at 795 lbs. for a 305e, it's a pretty "big block"! But I would be willing to bet Longhorn Man is right, that is was never originally referred to as a big block, and that designation came about later, as V6 engines became more available and popular. IIRC, there is no "small block" vs. "big block" on the GMC V6, they all used the same block, unlike the Chevy V8's.
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There is a theory which states that if ever anyone discovers exactly what the Universe is for and why it is here, it will instantly disappear and be replaced by something even more bizarre and inexplicable.There is another theory which states that this has already happened. - Douglas Adams '67 GMC 4x4, 305 V6! Or all the parts for anyway... '17 Subaru Outback. '18 Toyota Tacoma TRD Off Road. '99 Ducati 900SS. |
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#15 |
Old Skool Club
![]() Join Date: Jun 2001
Location: Benton, AR "The Heart of Arkansas"
Posts: 10,880
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Re: What is it and how does it work(pic)
A classmate of mine in high school drove a '60 GMC that had the same V-6 but with a 3-speed. It would pull from a low RPM in high gear without missing a beat. Gobs of torque.
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Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was. |
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#16 |
Registered User
Join Date: Mar 2005
Location: Fairfield Maine
Posts: 1,759
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Re: What is it and how does it work(pic)
So you are saying that my 4.3 v6 is the same size block as my 305e v6
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#17 |
I have a radical idea!
Join Date: Jan 2005
Location: Sweet Home Alabama!
Posts: 6,513
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Re: What is it and how does it work(pic)
Of course not, but the 4.3L didn't exist in 1960 when these came out. The only real big block engines are the big block Chevys, big block 429-450 fords, and 383-440 big block Chryslers. Pontiacs, Olds, Buicks and Caddys are often referred to as big blocks, but they really aren't, even though some of them are big engines. Jolly's 60-66 gmc website does refer to them as big block V6's, but it is technically incorrect.
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'67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club! |
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#18 |
Registered User
Join Date: Sep 2006
Location: New Haven, MO
Posts: 1,243
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Re: What is it and how does it work(pic)
subscribed for the lmao factor!
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-Lincoln 1987 GMC S15 (soon to be a chevy clone) ![]() 2.5l, 4 speed, no ps, no pb, no ac Silence is golden, but duct tape is silver. ![]() Spoken by Cletus the hillbilly I like stickers... a whole bunch. |
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#19 |
just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: What is it and how does it work(pic)
Google "big block pontiac" and I guarantee you that you get some hits on that term.....Don't make it so though.
All of the Pontiac V8s from 1955- to the late 70s when the "corporate engine" mess started used the same size block. 287-455, they had different bore sizes and stroke lengths...I think there was a main bearing size thing in there somewhere too, but the blocks were the same externally. It's just like all of the "head" names for Harleys. They(HD) did not use those names..Knucklehead, Panhead, Shovelhead, Blockhead, were terms used by the riders/bikers/mechanics, given to the various year groups of what Harley Davidson called OHV. Meaning "Over-Head Valve" as opposed to Flat-heads of the same era. Harley picked-up and even trademarked those words later, but they didn't create them. |
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#20 |
Registered User
Join Date: Mar 2005
Location: Fairfield Maine
Posts: 1,759
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Re: What is it and how does it work(pic)
Thats why i thought it was true because this motor is huge compared to any other v6s
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#21 |
Texas Big Wig
Join Date: Jan 2007
Location: Mineola, Texas
Posts: 5,620
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Re: What is it and how does it work(pic)
The GMC V-6's are some really cool old engines
big block or not, they are some BIG HEAVY engines ![]() When you do get it going, dont try to rev it very hard, as they are big & heavy with no harmonic balancers & they wont last well if you twist em... ask me how I know this ![]() |
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#22 |
Senior Member
Join Date: Feb 2006
Location: Lilburn Georgia
Posts: 1,240
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Re: What is it and how does it work(pic)
I know it is not an official big block but it makes me wonder was a 396 427 454 ever call big block officially by chevy??or was it a slang term that caught on and with the 305 having a bore size of 4.25 the same as a 454 and the 351 having a bore of 4.560 way bigger than even a 502 I would say it could be called a big block V-6 but it does have a in line valve train system like the small blocks so who knows??????
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#23 |
Registered User
Join Date: Mar 2005
Location: Fairfield Maine
Posts: 1,759
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Re: What is it and how does it work(pic)
I guess i should be calling them a large block v6 seeing how its bigger than any v6, and bigger than any small block chevy ive seen.Hearing the history of these i cant call it just a v6 Its all good because anything that sparks interest in our hobby and these trucks maybe will save one more from beeing chrushed! I used to have that attitude of its just a v6 pull it, junk it,not now. i love small block chevys, but this thing is cool.So far everytime i have opened the hood for someone they say what the - is it? Its a305e that only came in in a GMC TRUCKS
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#24 |
Sierra Grande Club
Join Date: Jan 2007
Location: New Mexico USA
Posts: 2,433
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Re: What is it and how does it work(pic)
It's a small block-and-a-half!
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__________________
1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe. ![]() |
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