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68GMCCustom · 06-11-2011, 06:00 PM

see the plug w/allen wrench fitting? Its a plug for the cooling system and where your temp sensor can go. Usually the drivers side (at the front or block) is used, I removed the passenger side (at the back of block) plug and tapped it for 1/8" NPT or maybe 1/4" NPT...can't remember. then put the plug in the drivers side hole left after removing oem sensor.

06-11-2011, 06:00 PM	#6
68GMCCustom Truck and auto performance nut Join Date: Feb 2007 Location: McKinney,Texas Posts: 3,848	Re: Mechanical gauges on a LS swap see the plug w/allen wrench fitting? Its a plug for the cooling system and where your temp sensor can go. Usually the drivers side (at the front or block) is used, I removed the passenger side (at the back of block) plug and tapped it for 1/8" NPT or maybe 1/4" NPT...can't remember. then put the plug in the drivers side hole left after removing oem sensor. __________________ Kurt - '68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy '72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close '06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD '18 Kia Sorento - wife's econo-driver '95 Chevy S10 - reg cab shortbed, LS, 4.3, auto... my '68's powertrain and chassis build -links broken A surprise phase - carb to efi -links broken Last edited by 68GMCCustom; 06-11-2011 at 06:00 PM.