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Old 08-14-2010, 01:51 PM   #5
GMC Guy
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Join Date: May 2009
Location: Sparks, NV
Posts: 913
Re: smooth firewall guys

i have the one from summit. it works really well, and very simple to install. only thing is the ducting from the heater doesn't match up with the original defrost ducts in the truck. if anyone has any ideas on how to mate the summit heater ducts to the originals, it'd be much appreciated.
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Greg
1974 GMC
1/2 Ton SWB Fleetside
L33 5.3/4l65e

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