Help Decode my motor & Heads! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

petey-pablo · 10-17-2008, 12:36 AM

The numbers on the block are #14015445 last number is a 5 or a 6 is it a 2 bolt or a 4 bolt how can I tell?

The heads seem alittle wierd to me two different numbers is that how it is supose to be?

Passanger side is Markings on it GM3T E24\76 #346236

Driver side is Markings on it 346\ CFO or CFD #14081045

Oh and by the anyone know if my intakemanafold is a good one it is a Weiand #7544?

CG · 10-17-2008, 12:48 AM

You can look up all your numbers here....

http://www.mortec.com/

petey-pablo · 10-20-2008, 12:08 AM

The heads Have two different numbers is that how it is supose to be? I checked my numbers with http://www.mortec.com

Passanger side is Markings on it GM3T E24\76 #346236
This is what I came up with...
Mortec Site read the following= 75-87...OVAL...OPEN...454,120cc Chamber,225/116cc Ports

Driver side is Markings on it 346\ CFO or CFD #14081045
And Mortec Site read the following= 78-87...OVAL...OPEN...454

Are these any good I mean the motor runs fine could they cause the motor damage in the long run because they are different in Numbers?

Gray Ghost · 10-20-2008, 12:23 AM

Only way to tell is to open it up and count the bolts in the main caps...seems they never coded 2 or 4 bolts from the outside.

10-17-2008, 12:48 AM	#2
CG BlahBlahBlah Join Date: Feb 2002 Location: Wa. Posts: 19,992	Re: Help Decode my motor & Heads! You can look up all your numbers here.... http://www.mortec.com/

10-20-2008, 12:23 AM	#4
Gray Ghost Senior Member Join Date: Sep 2004 Location: Terrell, TX Posts: 1,967	Re: Help Decode my motor & Heads! Only way to tell is to open it up and count the bolts in the main caps...seems they never coded 2 or 4 bolts from the outside. __________________ Kelly '05 GMC Sierra SLE Z71 Bone stock except for new bed rail caps.

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10-17-2008, 12:36 AM	#1
petey-pablo "THE GREEN GOBLIN" Join Date: Mar 2008 Location: Fremont Ca. Posts: 1,025	Help Decode my motor & Heads! The numbers on the block are #14015445 last number is a 5 or a 6 is it a 2 bolt or a 4 bolt how can I tell? The heads seem alittle wierd to me two different numbers is that how it is supose to be? Passanger side is Markings on it GM3T E24\76 #346236 Driver side is Markings on it 346\ CFO or CFD #14081045 Oh and by the anyone know if my intakemanafold is a good one it is a Weiand #7544? __________________ Petey-pablo "THE GREEN GOBLIN" 1972 Cheyenne 10 Short Fleet Side Front 2.5inch Spindles with 2inch Springs Rear 4inch drop Springs. 454BBC TH400,Posi 1971 Cheyenne 10 Long Fleet Side 454BBC TH350,Posi Sold Drive it like you stole it! Petey-pablo@sbcglobal.net

10-20-2008, 12:08 AM	#3
petey-pablo "THE GREEN GOBLIN" Join Date: Mar 2008 Location: Fremont Ca. Posts: 1,025	Re: Help Decode my motor & Heads! The heads Have two different numbers is that how it is supose to be? I checked my numbers with http://www.mortec.com Passanger side is Markings on it GM3T E24\76 #346236 This is what I came up with... Mortec Site read the following= 75-87...OVAL...OPEN...454,120cc Chamber,225/116cc Ports Driver side is Markings on it 346\ CFO or CFD #14081045 And Mortec Site read the following= 78-87...OVAL...OPEN...454 Are these any good I mean the motor runs fine could they cause the motor damage in the long run because they are different in Numbers? __________________ Petey-pablo "THE GREEN GOBLIN" 1972 Cheyenne 10 Short Fleet Side Front 2.5inch Spindles with 2inch Springs Rear 4inch drop Springs. 454BBC TH400,Posi 1971 Cheyenne 10 Long Fleet Side 454BBC TH350,Posi Sold Drive it like you stole it! Petey-pablo@sbcglobal.net



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