What engine is this?

[pritch]

I tried looking at de-coding page, now I'm really confused.
The stamped number is:V05TCYV
The casting #:3914678
The date stamp is E 3 8, but I believe the 'Burb was built in April-April 19th,9:15 AM is what is wrote up above the visor.
Oh, yeah-the block has a casting clock, but I read that Saginaw was the only plant that used this, but the 'V' says it was made at Flint? Is that right?

And are these heads any good? 3911032

Thanks in advance