Same one I have, I am told teh 959 is pretty common for buildups.
454 Big Block Casting Numbers
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! 
