It is a 4 bolt block that I know for sure. The 010 020 thing I read up on too and im hoping it is 010 or 020 that is the block wiht the higher amount of nickel in it. Im checking under the timing cover tom for that, and ill probally get the suffix code to just for kicks.
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USAF Jet Propulsion Specialist
 1985 383 Camaro-nothing special I promise 
2000 NBM z28-also nothing special
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