Can anyone tell me if they are 350 or 340 heads? Here's the numbers GM 10 M 13 R-1376330-K A guy at work wants to build a set of 350 Stage 1 heads out of these. Where can I get a book with #'s for Buick motors, both big and small block? Thanks, P.D.
http://www.atlantabuick.com/CastingNumbers.htm http://swapmeet.ca/codes/buick_smallblock_casting.html http://buicks.net/shop/reference/smallblock_casting_numbers.html The closest number I could find to yours is: 1366379 - 67 340
Thanks! Thanks Adam for the links and info. The valve covers say 340, the air cleaner says 350 and its a '69 Special Deluxe 4dr. I'll have to blow the dust off of the vin and find out what it's supposed to have. P.D.