1969 black on black ss 396

[chevyman0429]

Well I was told from the gentlemen I got this car from that it was an original L78 car. But he had no documentation. Went out this morning and the front pulleys on the motor have these part numbers stamped in them. According to a document I found on the net these part numbers where used on the l78/l89 big blocks. I took some pics but with my phone and u cant make out the numbers, so im gonna dig out my camera and get some better ones. I know it doesnt mean much there just pulleys but still got me pumped up. Im gonna pull the(6000)tach out of the dash to see if its original or reproduction. The cars been restored once by the lions club but im gonna pull the seats out just to check for buildsheet. Any specifics on fremont cars about where they put the build sheets?
Crank pulley number 3955291
Water pump pulley 3947824
Power steering pulley 3941105 (damaged)