Re: Is this a 3963512 casting?
 

Here is picture of the passenger side.
http://img.photobucket.com/albums/v2.../pass-side.jpg

Here is a picture of the number on the passenger side before I tried cleaning it off.
http://img.photobucket.com/albums/v2...ode-before.jpg

Here is a picture after I tried cleaning it off.
http://img.photobucket.com/albums/v2...ode-after1.jpg

To me, it looks like a 8 -837 or a B-?37. Is this the date code? It does not make sense to me.

Re: Is this a 3963512 casting?
 

It looks like L.28.8---->Dec. 28th, 1968

The casting date is cast upside down. https://www.yenko.net/ubbthreads/imag...lins/beers.gif

Re: Is this a 3963512 casting?
 

AH....OK, great Thanks!!!

Re: Is this a 3963512 casting?
 

[ QUOTE ]
It looks like L.28.8---->Dec. 28th, 1968

The casting date is cast upside down. https://www.yenko.net/ubbthreads/imag...lins/beers.gif

[/ QUOTE ]
that date would make the motor a 427 High horse motor as you mentioned it is a 4 bolt main block. Great motor https://www.yenko.net/ubbthreads/imag...iggthumpup.gif
a 4 bolt main 427 for a 1969 Chevrolet means it came in a special car thats for sure.