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454 Big Block Casting Numbers

24947 Views 6 Replies 6 Participants Last post by  LS7
Can anyone please guide me in a direction where I could find out exactly what these numbers mean on my Big Block. Im guessing its the build date but couldnt find anything on here with a database. The casting number on my block are 361959 (P). Then theres C1677? From what Ive gathered the block is (P) Passenger big block from 73-76. Is this correct? Any guidance would be appreciated Thanks! :D
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361959 454 73-90 2 or 4 bolt

Used in cars, P/U trucks, and some crate engine assemblies.

Look above the timing chain cover, there may be a suffix code stamped there.
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