Dating the parts

[zac]

I took a full floater to a shop yesterday for a gear change, but the owner was mostly interested in talking about my burb. I told him the deal about how it's a '70 C10 body on a 67-72 K10 burb frame. The q-jet is a '68, but the intake has a '70 date code. He pulled some numbers off a pad on the block in front of the passenger side head that ended with TBB. He checked a huge book he had and the TBB indicated the block at least was originally in a '79 pickup, blazer or jimmy. So I'm just wondering if I can date any of the other components.

Are there any codes on the sm465 or np205 that would help? I noticed under the grease both still had alot of a red-oxide colored paint on them. Are there little differences in the frames anyone knows of? Any other ideas? I had assumed someone just put the body on an intact chassis, which was a stupid assumption. I wouldn't do something like that. I'm sure the original 4-bolt 350 is running around in a Camaro somewhere. I know none of this really matters at the end of the day, but it just kills me to have all these unknowns.