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Questions about 454 build process at GM factories

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Two questions ... I am investigating my 454 block, as the heads are at the machine shop, confirming a few details from what the PO told me about the engine and the various stampings found on it.

It's indeed a '90 Mark IV block, casting 10069286, forged on Feb 20th, 1990 (B 20 0).
Its a 4-bolt 'short' deck. One marking on it has "K22 445 HI PERF PASS". I believe the K notes that it was forged in Canada, as ones that had "M" was forged in Mexico - but not 100% on that.

Question number 1 - I was told from the PO that the block was never torn into. However, I noticed 'numbered' stamps on each of the rod-caps, which I used in the past to keep what caps went to what rod during a rebuild. Would the factory could of done this too?

Question number 2 - The cam sprocket was really chewed up - and noticed this hard, honey colored coating on it, that was broken in several sections. Initially I thought that this may have been old oil, but it's really on there. Picture below. Thoughts to what this material is? Anyone seen this before?
The crank sprocket doesn't have any of this on it, and it's not chewed up either.

Thanks in advance,

-graham

Old-Cam-Sprocket.jpg
 
plastic coated timing gear from factory back in the day .

your lucky it had not jumped time yet looking like that .
 
sweetk30 said:
plastic coated timing gear from factory back in the day .

your lucky it had not jumped time yet looking like that .
Click to expand...

Thanks. Yeah, my cam kit came with a new timing gear/chain set, so I am definitely changing that. I was just surprised to see the original in that condition.
 
Most likely you'll find the nylon sprocket teeth in the oil pan,and stuck in the oil pump pickup tube screen--that is where I found them every time I did a timing chain job that was original--best to get them out of there,I found some mashed into the oil pump gears before--that screen can move upward and let stuff get in the pump.

I at least put steel gears back in,or preferably a double roller chain setup,on a higher performance engine...then you wont have any worries for another 100,000 miles..
 
roller or double roller chain is worth the money .

skip the common silent chain style they stretch fast and just suck .
 
sweetk30 said:
roller or double roller chain is worth the money .

skip the common silent chain style they stretch fast and just suck .
Click to expand...

Yes sir; I have Completed Cams double roller set #2110 set aside. I am not using the link set that came in my cam kit.
 
also from what I have read and been told on bbc . . . . cams not much bigger than stock require valve spring kits also . stock springs don't like much over stock lift .
 
Yup, my Comp Cam kit came with new springs, lifters, seals and retainers. The item I swapped out of this kit was going to a double roller timing set. The cam I am going with is the 260AH (computer controlled style). Should give me a little punch.
 
All blocks are cast not forged
Not sure on casting location
I don't ever recall seeing where GM stamped numbers into the conrods. measure the crank for being ground before
 
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