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| | | Forums66 Topics128,174 Posts1,057,049 Members48,458 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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#53033 11/29/2005 5:05 AM | Joined: Nov 2005 Posts: 24 Junior Member | | Junior Member Joined: Nov 2005 Posts: 24 | I just picked up my 1957 GMC half ton last week- my 1st old GM truck... I've owned a 64 Impala Super Sport and a 66 Olds Toronado... but no 50's vintage of car or truck till now.
Which motors had the cu inch cast into the block near the distributor?? I looked upon that oily/dusty/cake-like area today and saw no such numbers.... I have obviously been lead astray.. ha ha...ok, I've not really reached that conclusion- I'm just trying to figure it out... there was a TAG... not a cast number.. hiding behind the starter but it appeared to be a remanufacturing data info tag from the 1/2 of it that was visible. I could make out .030, .060, and .030 and the letters "ufactured engine"
Here is known data for identification help
1. 1957 GMC 1/2 Ton, 114 wb, Hydromatic(auto) 2. GMC on the valve cover.. 2 bolts on the cover.... centerbolts 3. I looked at a 6 in a 70's era Chevy this afternoon... it had a HEI style cap on the distributor and it was located towards the front of the block..... my distributor is small, with a coil, and is located at about dead center on the block on the passenger side..
4. Zenith carb on my intake right now... looks stock... this truck has most of its original equipment...complete set of gmc hubcaps, spare tire carrier is still attached under the bed...still has original seat in pretty good shape...what I'm saying here is it doesn't appear to have been modified ... STILL has factory automatic in place.. old "army jeep" type tubed skinny tires on the stock wheels.. 5. I am judging this to be a factory Hydromatic due to the lack of any clutch pedals and the big "HYDROMATIC" badge on both fenders.. and of course the 50's vintage stock shifter on the steering column...don't know if hydro was offered with only specific cubic inch motors....this is why I'm saying this..
6. "100" badge in the grill
7. partidge in a pear tree... ha, ha..what??!! it's Christmas time..gotcha!
My digging on the oily-cake on the side of the engine today was under the distributor and below it and to the left...no dice...
I went to the oldgmc site earlier... but found no real help..even though I was armed with my serial number..
So... there is some info for the decifer of the engine... let me know your guesses and why your saying that.... and also what I can do ...or look for to end the mystery...thanks Stovebolters... Kyle | | |
#53034 11/29/2005 5:12 AM | Joined: Mar 2005 Posts: 70 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2005 Posts: 70 | look under the tread about GMC 302 one of the guys talk about the GMCs being marked near the distributor | | |
#53035 11/29/2005 5:29 AM | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | the "... ufactured engine" is the rebuilders tag, sez remanufactured! they commonly shaved off original stampings check at Rob\'s site to find out the most likely candidates, might be the 270 or 302 Bill | | |
#53036 11/29/2005 5:34 AM | Joined: Nov 2005 Posts: 24 Junior Member | | Junior Member Joined: Nov 2005 Posts: 24 | ok... I did NOT look directly behind the distributor...and I just went to inliners.org and found the casting numbers....I'll check Rob's site now | | |
#53037 11/29/2005 5:40 AM | Joined: Nov 2005 Posts: 24 Junior Member | | Junior Member Joined: Nov 2005 Posts: 24 | what is the location on the block of the casting numbers... and where on heads is it located?? | | |
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