Who's Idea Was It To Put Engine #s.... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

THE "10" SILVERADO · 09-06-2011, 10:18 PM

Just to start off, who's idea was it to put the engine number on the engine next to the transmission? It is a very big PITA to get to.

Alright, off that soap box. I have been under the assumption that my engine is a 307 based on what the previous owner told me when I bought it, I wasn't to concerned about what the engine was because it would be replaced anyway...well I got curious this weekend and checked the numbers out for myself. I could not find the identification numbers on the pass. side. Banged my head good a couple times trying to see down there to...but I did find a number on the drivers side that was interesting "3970010". I don't see this as the casting number for any 307s but I do see it as a number for the 69-79 truck 350 engine.

Is there any other way to find out if it is a 350 besides the pass. side number? It's really hard for me to get down there and I don't want to have to strip down me engine to get back there.

Thanks

*78 Chevyrado* · 09-06-2011, 10:23 PM

look behind your alternator, there's a pad there where the head seats on the block with numbers on it to identify the engine itself, as long as the head deck hasn't been milled which means the numbers are long gone.

gearheads78 · 09-06-2011, 10:34 PM

thats a 69-79 350 block

WarBeard · 09-06-2011, 10:39 PM

could be a 302 327 or 350 2 or 4 bolt mains
Depends on the crank as well
this is for the 3970010 block

3970010....302.....69....4...Z-28 Camaro
3970010....327.....69....2...Trucks and industrial
3970010....350...69-80...2 or 4

406 Q-ship · 09-07-2011, 10:54 AM

3970010 is the casting number for a large bearing 4" bore block. No way it can be a 307. I could be a 327 if someone put a 307 crank into it with 327 pistons.

GmtGmt · 09-07-2011, 01:27 PM

same numbers on my 73 stepside after i looked under the altenator it turned out to be a HO 350 from 1977

Hoods69BadBowTie · 09-07-2011, 02:35 PM

That be cool if it was 350. You could go to the auto parts store and buy one of those cheap mirrors from by there counter and try that see if it helps out. Ya I hate the numbers in the back as well I am too big I don't event try to go back there to find out haha

THE "10" SILVERADO · 09-07-2011, 09:06 PM

Quote:

Originally Posted by Hoods69BadBowTie

That be cool if it was 350. You could go to the auto parts store and buy one of those cheap mirrors from by there counter and try that see if it helps out. Ya I hate the numbers in the back as well I am too big I don't event try to go back there to find out haha

It would explain why I get wheel spin almost everytime I move

motornut · 09-08-2011, 10:15 AM

thats the block number in my 78 jimmy,
350 and its got 4 bolt mains
never did figure the other (alt)numbers out

09-06-2011, 10:18 PM	#1
THE "10" SILVERADO Registered User Join Date: Sep 2010 Location: Marble Falls, TX Posts: 1,575	Who's Idea Was It To Put Engine #s.... Just to start off, who's idea was it to put the engine number on the engine next to the transmission? It is a very big PITA to get to. Alright, off that soap box. I have been under the assumption that my engine is a 307 based on what the previous owner told me when I bought it, I wasn't to concerned about what the engine was because it would be replaced anyway...well I got curious this weekend and checked the numbers out for myself. I could not find the identification numbers on the pass. side. Banged my head good a couple times trying to see down there to...but I did find a number on the drivers side that was interesting "3970010". I don't see this as the casting number for any 307s but I do see it as a number for the 69-79 truck 350 engine. Is there any other way to find out if it is a 350 besides the pass. side number? It's really hard for me to get down there and I don't want to have to strip down me engine to get back there. Thanks __________________ Michael Re-starting the neglected '77...http://67-72chevytrucks.com/vboard/s...=425464&page=9

09-06-2011, 10:23 PM	#2
78 Chevyrado Account Suspended Join Date: Dec 2007 Location: Unnapreciative, Trollville Posts: 2,079	Re: Who's Idea Was It To Put Engine #s.... look behind your alternator, there's a pad there where the head seats on the block with numbers on it to identify the engine itself, as long as the head deck hasn't been milled which means the numbers are long gone.

09-06-2011, 10:34 PM	#3
gearheads78 Registered User Join Date: Aug 2011 Location: Dallas TX Posts: 563	Re: Who's Idea Was It To Put Engine #s.... thats a 69-79 350 block

09-06-2011, 10:39 PM	#4
WarBeard Registered User Join Date: Jul 2008 Location: Show low,az Posts: 808	Re: Who's Idea Was It To Put Engine #s.... could be a 302 327 or 350 2 or 4 bolt mains Depends on the crank as well this is for the 3970010 block 3970010....302.....69....4...Z-28 Camaro 3970010....327.....69....2...Trucks and industrial 3970010....350...69-80...2 or 4 __________________ 1978 C10 Silverado Big 10 350/350.. play toy 1990 V1500 Suburban 350/700r4..Daily driver 1987 K10 Silverado 383/400.. Wife's rig WRECKED! 1989 V2500 Suburban 350/400.. SOLD! 1974 C10 Custom10 LWB 350/350.. SOLD! 1974 C10 Custom10 SWB 350/400.. SOLD! 1999 Silverado Z71 LS1.. Wife's rig WRECKED! On the hunt for a new project....... I'm a Chevy guy.....I'm just not a "NEW" Chevy guy.

09-07-2011, 10:54 AM	#5
406 Q-ship Registered User Join Date: Oct 2010 Location: Largo Florida Posts: 632	Re: Who's Idea Was It To Put Engine #s.... 3970010 is the casting number for a large bearing 4" bore block. No way it can be a 307. I could be a 327 if someone put a 307 crank into it with 327 pistons. __________________ Lifes journey is not to arrive at the gate well preserved, it is to slide in sideways all used up and wore out yelling.....God what'a ride! Where patience fails, force prevails Stapp's Ironical Paradox "The universal aptitude for ineptitude makes any human accomplishment an incredible miracle."

09-07-2011, 02:35 PM	#7
Hoods69BadBowTie Chevys Kick A$$ Join Date: Jan 2005 Location: Zootown, MT Posts: 12,699	Re: Who's Idea Was It To Put Engine #s.... That be cool if it was 350. You could go to the auto parts store and buy one of those cheap mirrors from by there counter and try that see if it helps out. Ya I hate the numbers in the back as well I am too big I don't event try to go back there to find out haha __________________ HOODS is what I answer too -'79, '77, '88 Pickup Sold, '85 Camaro, '83 T/A, '81,'83,'90 K5 Blazer All Sold -'79 3/4 ton "Big Yellow Bananna" Lifted 4spd. 39.5 TSL Swampers, The money Pit -'86 K5 Blazer Silverado 6.2 4" lift 35"s -'95 Ext. Cab Shorty 4" Tuff Country rolling 35" M/T's -'83 Monte Carlo T-Tops. 126,500 Original Miles -LATER I would rather push a Chevy then drive a ford!!

09-08-2011, 10:15 AM	#9
motornut 78K & 79C Jimmys Join Date: Nov 2009 Location: Ottawa Ont CANADA Posts: 7,901	Re: Who's Idea Was It To Put Engine #s.... thats the block number in my 78 jimmy, 350 and its got 4 bolt mains never did figure the other (alt)numbers out Attached Images __________________ John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350

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