tune specs - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bryansfinishes · 10-16-2005, 07:41 PM

hey guys does anyone have the tune-up specs for a 68 gmc 250 inline 6.

68haywagon · 10-17-2005, 10:29 AM

This is for a 68 Chevy 250, but it hould be the same:

Firing order: 1-5-3-6-2-4
Plug gap: 0.035"
Point gap: new-0.019"
used-0.016"
Dwell angle: 31-34 degrees
Ignition timing should be on the sticker under the hood. I think mine was 4*btdc.

Anything else?

Mike

10-16-2005, 07:41 PM	#1
bryansfinishes Registered User Join Date: Jan 2004 Location: Boise, Idaho Posts: 10	tune specs hey guys does anyone have the tune-up specs for a 68 gmc 250 inline 6.

10-17-2005, 10:29 AM	#2
68haywagon I'm watching you! Join Date: Feb 2005 Location: Levittown, PA Posts: 1,822	Re: tune specs This is for a 68 Chevy 250, but it hould be the same: Firing order: 1-5-3-6-2-4 Plug gap: 0.035" Point gap: new-0.019" used-0.016" Dwell angle: 31-34 degrees Ignition timing should be on the sticker under the hood. I think mine was 4*btdc. Anything else? Mike __________________ 2012 Chevrolet Silverado 1500 Z71 4WD 1993 Chevrolet C-1500 W/T - Blue - 4.3L V-6, 4 speed auto - Dad's (RIP) 1992 Chevrolet S10 - LS swap project 1968 Chevrolet C-10 longbed fleetside - sold



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