Newbie to the Olds world - have a recent purchase 1970 442 and trying to see if my block is original. See pics attached. The X130674 does not match my VIN but could this be a machine shop stamp? I thought a VIN stamp had more digits

 

Looks like a factory stamping that wasn't stamped evenly.

X is the Kansas plant, they built the big cars and not A bodys.

 

Looks like a 1971 block?

 

^^^This. Fairfax, KS to be exact. Fairfax only built B-body cars in that timeframe, so this block came out of a Delta 88.