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Old 08-21-2010, 07:01 PM   #94
OKGMC4
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Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,220
Re: Yet another GMC build

I hope this info helps someone with their LSX swap...I made several trips to the parts store looking for radiator hoses and this is what I came up with. I found a Gates 21710 hose to work on the lower if the end with the 90 degree turn is cut off. It's a lower hose for a 88-90 350 pickup. The upper was a problem. I couldn't find a good replacement for this BUT I ended up killing two birds with one stone. The 5.3l outlet is 1 1/4 and the rad is 1.5" I also needed to plumb in the steam line at the front of the intake, so I had a reducer adapter made and tapped it for a barbed fitting. I reused the 90 degree I cut off the lower hose and bought a 20661 hose to finish the circuit. It shows to be a lower hose for a 90-93 Miata. I have seen these hose adapters offered from Autometer and from JTR (Jags that Run, guys famous for their small block into anything swap parts). I know I could have used flex hose but I like parts that can be had in any parts house so it's easier to find later down the road.
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56 GMC BUILD THREAD:
http://67-72chevytrucks.com/vboard/s...d.php?t=368649

69 long bed Chevy turned 67 gmc jimmy roadster:
https://67-72chevytrucks.com/vboard/...d.php?t=851167
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