Please help w/ motor size - The 1947 - Present Chevrolet & GMC Truck Message Board Network

4bynut · 06-11-2005, 10:26 PM

I have a v8 in a 69-70 GMC 1/2 ton I'm parting and I need help trying to decide what it is. The #'s on the block aren't listed in the book I have. The # on the back of the block is: 10066038 and on the front of the block by the head it is: MAI 9353. The glove box door list it as a 296 v8 which I've never heard of. Thank's in advance, Jason

Robert1970C20rstbukt · 06-11-2005, 10:31 PM

My best guess is that it's a mis-print on the decal, and the engine is actually a 396 big block.

*Randy70C-10* · 06-11-2005, 10:35 PM

10066038...350.....92....4...Goodwrench crate motor, 2-piece rear
seal, "Hecho en Mexico" http://www.mortec.com/castnum.htm

Big Bad 1972 Blazer · 06-11-2005, 10:38 PM

Here's what I dug up from my info on the casting number from the block....10066038...350.....92....4...Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico"

Looks like the motor probably was swapped out at some point in it's life.

4bynut · 06-12-2005, 01:01 AM

Thank's for your help guy's. I really appreciate it. Do you know if them are good. I seem to remember hearing something about problems with the GM motors from mexico. But I don't know if it was just certian years. Also would it be a four bolt main block? Thank's again Jason

JimKshortstep4x4 · 06-12-2005, 05:42 AM

Mortec lists the engine as having 4 bolt mains.

Jim

*Randy70C-10* · 06-12-2005, 10:13 AM

The Mexican engines were called "Targetmasters". They were built with some heavy-duty parts and put together quite well. You shouldn't have any problems with that engine.

06-11-2005, 10:26 PM	#1
4bynut Senior Member Join Date: Mar 2004 Location: Morrison, IL Posts: 793	Please help w/ motor size I have a v8 in a 69-70 GMC 1/2 ton I'm parting and I need help trying to decide what it is. The #'s on the block aren't listed in the book I have. The # on the back of the block is: 10066038 and on the front of the block by the head it is: MAI 9353. The glove box door list it as a 296 v8 which I've never heard of. Thank's in advance, Jason __________________ 2007 Chevy 2500HD crew cab, 4x4, duramax w/Allison trans. 2001 Chevy ZR2 Ext. cab 4x4 (DD) 1967 Chevy SWB 4x4, BBC, Th400, NP205, 6" lift, and 35's (In Process) 1970 Chevy Blazer 4x4, BBC, TH400, NP241, 6" lift, and 38.5 boggers in front, 44 boggers on the rear ( mud racer project) Last edited by 4bynut; 10-04-2007 at 09:31 PM.

06-11-2005, 10:31 PM	#2
Robert1970C20rstbukt Registered User Join Date: Jun 2004 Location: Beeville, Texas Posts: 1,943	My best guess is that it's a mis-print on the decal, and the engine is actually a 396 big block. __________________ RJD 1984 Chevrolet C30 welding truck 454/SM465 1977 GMC C15 pickup 350/TH350 1970 Chevrolet C20 pickup 350/TH400 1970 Chevrolet K20 Suburban 454/TH350 1969 GMC 8500 478M V6/5 spd winch truck

06-11-2005, 10:35 PM	#3
Randy70C-10 Account Suspended Join Date: Mar 2001 Location: Virginia Beach, Va. U.S.A. Posts: 15,320	10066038...350.....92....4...Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico" http://www.mortec.com/castnum.htm Last edited by Randy70C-10; 06-11-2005 at 10:35 PM.

06-12-2005, 01:01 AM	#5
4bynut Senior Member Join Date: Mar 2004 Location: Morrison, IL Posts: 793	Thank's for your help guy's. I really appreciate it. Do you know if them are good. I seem to remember hearing something about problems with the GM motors from mexico. But I don't know if it was just certian years. Also would it be a four bolt main block? Thank's again Jason __________________ 2007 Chevy 2500HD crew cab, 4x4, duramax w/Allison trans. 2001 Chevy ZR2 Ext. cab 4x4 (DD) 1967 Chevy SWB 4x4, BBC, Th400, NP205, 6" lift, and 35's (In Process) 1970 Chevy Blazer 4x4, BBC, TH400, NP241, 6" lift, and 38.5 boggers in front, 44 boggers on the rear ( mud racer project)

06-11-2005, 10:38 PM	#4
Big Bad 1972 Blazer Registered User Join Date: Jan 2005 Location: Armada, MI 48188 Posts: 83	Here's what I dug up from my info on the casting number from the block....10066038...350.....92....4...Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico" Looks like the motor probably was swapped out at some point in it's life.

06-12-2005, 05:42 AM	#6
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Mortec lists the engine as having 4 bolt mains. Jim

06-12-2005, 10:13 AM	#7
Randy70C-10 Account Suspended Join Date: Mar 2001 Location: Virginia Beach, Va. U.S.A. Posts: 15,320	The Mexican engines were called "Targetmasters". They were built with some heavy-duty parts and put together quite well. You shouldn't have any problems with that engine.



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