I just got a 427 from Ben (thanks again) and the casting number is "473478". The truck was reputed to be a '71 or so body, but when I looked up that casting number it said on some sites that that was a '77-'90 motor, but on some they just lumped all 427's together and said it was made from '68-'90.

The valve covers said "TARGET MASTER 427" and when I looked that up it was apparently GM's crate motors years ago.

Anyone have any idea.....or care enough to look? I'm wondering if this is a crate motor that was installed after '77 as that would make me all the happier.

I'm just curious.
-B.