I have a 1990 Astro 2wd with a bad motor (knocking from the bottom of the engine and losing compression). I am buying a rebuilt 4.3 liter engine and looking for tips from anyone who has replaced one of these engines. Also I need a service manual for it, not a Haynes but the Helms manual that the dealer uses. Since it will take months to get this from Helms, I wonder if anyone knows where I can get one?
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