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#1 |
Registered User
Join Date: Sep 2003
Location: Houston, Missouri
Posts: 17
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Got a 1971 GMC 3500 Dually with a 350cid, 4 speed granny 1st.
Was just looking at the engine the other day and happened to think to look at the engine # boss to record the numbers. Got the boss clean and low and behold NO NUMBERS! Doesn't look to have been altered at all, just looks like no numbers have ever been stamped. Anyone ever run into this? |
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#2 |
Resident Curmudgeon
![]() Join Date: Dec 1999
Location: NH
Posts: 6,664
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Where are you looking? The #'s are cast in front of the bell housing on LH side. Check this site for more info
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Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter ![]() Maybe I need to sell some of this crap ![]() Yet another Bozo with a sawz-all |
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#3 |
Registered User
Join Date: Sep 2003
Location: Houston, Missouri
Posts: 17
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Looking at the number boss that sticks out just below the right head. It's about 1" wide x 2" long with a machined surface on the top.
Looking at that site posted, it's the 4th position labeled as the ENGINE ASSEMBLY DATE/SUFFIX CODE and partial VIN code. Last edited by TreverSlyFox; 12-02-2003 at 01:26 PM. |
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#4 |
Registered User
Join Date: Mar 2003
Location: Northern Illinois
Posts: 2,181
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Trever,
I'm not sure that every application had numbers stamped there. I believe that some did and some did not. Hope this helps, Brian |
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#5 |
Wiseass secured himself a BAN
Join Date: Nov 2000
Location: MOON!!!
Posts: 2,282
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My block numbers were casted into the block and they were on the driver side. You may have grab a can of brake cleaner and a wire brush to see them....
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#6 | |
Keepin an eye out
Join Date: Feb 2003
Location: So.Cal
Posts: 3,921
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Quote:
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1970 Chevy C10 SWB 5.3 1996 Toyota Tacoma SR5 4x4 2007 Vespa GTS 250 Scooter ZIP 91351 |
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#7 | |
Registered User
Join Date: Oct 2001
Location: Grapevine, Tx.
Posts: 2,142
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I got this off of the mortec site:
Quote:
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John Hutchison Grapevine,Texas 68 1/2 t swb 68 Mustang 69 Jaguar 71 1/2 t swb 88 Supra CompTs6m 93 Escort GT 2005 Corolla XRS |
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#8 |
Too many is never enough!
Join Date: May 2003
Location: Idaho Falls, ID
Posts: 455
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decked
Like hutch said. If the numbers are missing, good chance it has been decked. Not such a bad thing, means it has at least been gone through. Sometimes the machinist might put there own mark or serial number there also. The width of the pad is also a good quick indicator whether it is an early block or not. A pad for a '71 should be about 3" long and not rectangular where a later block has a smaller pad and is cast square.
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Jason 1968 K10 SWB Fleetside 1971 K2500 GMC LWB 1968 K20 (later frame, donor body) 1972 C20 LWB parts truck 1993 K2500 Suburban, tow rig, 454, 4L80E NEW!! 18' Siem's car hauler 2004 Honda Odyssey (family man!) |
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#9 |
Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Could be a crate motor. Check the # behind driver side head to see what year this block was used.
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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