New heartbeat old truck????? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jims69 · 04-13-2005, 09:32 PM

What does everyone think of a new 8.0 GM in our trucks? How do you think it will fit? If I'm crazy let me know, just sittin' here letting my mind exercise.

dwaite72lnghrn · 04-13-2005, 10:02 PM

You looking at the 8.1L (496) or the 8.2L (502) or bigger?
They have almost the same outside size of the BBC and most external parts are interchangeable. You would have to convert your fuel pump to electric intank or external electric (new blocks don't have Boss for mech fuel pump). 8.1L is computer controlled and the 502 is old school mechanical.

jims69 · 04-13-2005, 10:07 PM

I am meaning the one that comes in the new Chevy/GMC trucks?

dwaite72lnghrn · 04-13-2005, 10:47 PM

Thats the 8.1L computer controlled and I think it is drive by wire (no cable from pedal to TBI) on the 2005 models. You would need to get the wire harness and computer from the same year truck and trans also. It should fit in the compartment might have an issue with the brake booster and the coil on plug as they stick up higher on the valve covers than a stock BBC. Like I said you will need a electric fuel pump, I think it uses about 40psi to the TBI instead of the 6 psi of the old carb engines.

04-13-2005, 09:32 PM	#1
jims69 Registered User Join Date: Feb 2005 Posts: 82	New heartbeat old truck????? What does everyone think of a new 8.0 GM in our trucks? How do you think it will fit? If I'm crazy let me know, just sittin' here letting my mind exercise. __________________ Jim SW PA. 69' GMC SWB 4X4 (in progress). 86' GMC LWB 4X4 (daily) 86' Chevy LWB 4X4 (beater)

04-13-2005, 10:02 PM	#2
dwaite72lnghrn Registered User Join Date: Jun 2002 Location: central pa Posts: 1,525	You looking at the 8.1L (496) or the 8.2L (502) or bigger? They have almost the same outside size of the BBC and most external parts are interchangeable. You would have to convert your fuel pump to electric intank or external electric (new blocks don't have Boss for mech fuel pump). 8.1L is computer controlled and the 502 is old school mechanical. __________________ 72 longhorn c30 502BB/th400/fact air/4.11rear/ custom camper 72 bug(the better half's) under reconstruction 2009 HHR aqua blue 71 GMC k20 350/sm465 2009 Chevy hd3500 6.6 Victory Red crew cab dually Dave & Jeanne

04-13-2005, 10:07 PM	#3
jims69 Registered User Join Date: Feb 2005 Posts: 82	I am meaning the one that comes in the new Chevy/GMC trucks? __________________ Jim SW PA. 69' GMC SWB 4X4 (in progress). 86' GMC LWB 4X4 (daily) 86' Chevy LWB 4X4 (beater)

04-13-2005, 10:47 PM	#4
dwaite72lnghrn Registered User Join Date: Jun 2002 Location: central pa Posts: 1,525	Thats the 8.1L computer controlled and I think it is drive by wire (no cable from pedal to TBI) on the 2005 models. You would need to get the wire harness and computer from the same year truck and trans also. It should fit in the compartment might have an issue with the brake booster and the coil on plug as they stick up higher on the valve covers than a stock BBC. Like I said you will need a electric fuel pump, I think it uses about 40psi to the TBI instead of the 6 psi of the old carb engines. __________________ 72 longhorn c30 502BB/th400/fact air/4.11rear/ custom camper 72 bug(the better half's) under reconstruction 2009 HHR aqua blue 71 GMC k20 350/sm465 2009 Chevy hd3500 6.6 Victory Red crew cab dually Dave & Jeanne

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