Can someone help me with anengine number

[hugger6933]

On the heads is the casting number3814480 I think it said somewhere that those were used on the 327 [and 283] from 60 -67. That makes sense cause I have the numbers A-4-7 I think that would mean Jan 4th 1967 is when they were cast. I was told the motor was a 327 the number on the front of the block is VOI 23 YH I have not scraped the grease away from the back but i am doing that this afternoon along with trying to get my left hand floor and rocker welded up. Any help is great. Thanks Jim