A bit of Mopar History here for sale on Ebay THIS IS NOT MINE

All race blocks were casted using the 318 mold and take the left side engine mount for the the 318. This relocates the core plug on the left side. I know the difference in race blocks to standard 340's

Believe me These are 340 blocks pictured in the ad. They are now junk and more then likely to max bore. Usually they were built for one life and then thrown out. If they were race blocks of any type they would have stated that. They just state the stage number of their machining of destruction.

That is why I stated above to check out the core plug location. Dead give away. Junk! Or I am sure my son would have been on them.

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