AZ-Nick said

Thank you for your reply and pictures of the locations.
I was able to get a hanging light down near the firewall and a 2” round telescoping mirror down between the header tubes and with an additional high intensity flashlight aimed at the mirror I was able to identify only the following “-340-?” It was impossible for me to get a picture of the 340 because I needed to hold the mirror in one hand and the flashlight in the other hand. So far it is a 340, that is Great. What is upsetting if the next thing I saw is correct is below the #2 cylinder, in the mirror as in the picture it is upside down but it looks like 7*70.
Correct me if I am wrong!
I will try tomorrow to get the remaining casting numbers that are before the-340-?

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Heywodja said

Next time you take it in for an oil change ask the mechanic to snap a pic of the casting numbers right above the starter on the drivers side under cylinder #5

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On the passenger side there is a date the block was cast, it is towards the front right under cylinder #2 where the block meets the head

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