Those are not the casting numbers, but the engine numbers. The casting numbers are on the side of the and raised above the surface of the block. To decode what you have - PM - Mound Road engine plant 318 - 318-cid V8 R - Regular fuel 2726 - Date of assembly - January 13, 1968 2463 - Production number - 2,463rd engine built on January 13, 1968 If you check the block there might be a group of eight numbers/letters on the right (passenger) side of the engine above the oil pan to the rear of the engine mount. These are also stamped into the block. Bill Toronto, ON On Tue, Oct 4, 2011 at 12:00 PM, Layne Grissman <64polara500@xxxxxxxxx> wrote: > I have an engine block which is a 318. I don't know if it is an LA or > a Poly block...... > > the casting number is as follows: > P-M318R 27262463 > > If anyone could help, that would be great! thank you!!!! > > Layne > > -- > -- > Please address private mail -- mail of interest to only one person -- directly to that person. That is, send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! > > 1962 to 1965 Mopar Clubhouse Discussion Guidelines: > http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html. > -- > You received this message because you are subscribed to the Google Groups "The 1962 to 1965 Mopar Mail List Clubhouse" group. > http://groups.google.com/group/1962to1965mopars?hl=en. > -- -- Please address private mail -- mail of interest to only one person -- directly to that person. That is, send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! 1962 to 1965 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html. -- You received this message because you are subscribed to the Google Groups "The 1962 to 1965 Mopar Mail List Clubhouse" group. http://groups.google.com/group/1962to1965mopars?hl=en.