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Old 05-25-2011, 05:06 AM   #17
mcmlxix
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Join Date: Apr 2003
Location: Las Vegas
Posts: 3,106
Re: Hydroboost Mounting Plates

I would like to report that I checked a 1994 Astro/Safari hydro boost and a 2005 GMC 2500HD hydro boost and they are interchangeable. The Astro HB has a single locating keyway where the GMC 2500HD has dual keyways. The keyways are not symmetrical, but I was able to mount the factory Astro plate on the late model GMC hydro boost….
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