186 cylinder heads

[wisemanz28]

I'm looking at a set of 3927186 heads on ebay, the casting dates are H 14 9, my engine pad reads H 25 9. Would these dates be okay for my engine or are they too close?

[crobjones2]

Based upon what I have seen, they would line up for your motor build time frame

[wisemanz28]

Thanks

[wisemanz28]

After rechecking those heads the dates are H 15 and H 18, I'm hoping these dates are okay for my August 25 th motor. What is the rule of thumb for date coded engine parts ( such as heads)? How close can you get to the engine pad date? Any help is appreciated , thanks.

[68Zproject]

Do you know the cast date on the block?  That's what I would go by.  If the heads cast dates are somewhat close to the block cast date I think you would be alright.  On other posts, I think JohnZ said there was an example or two of blocks being cast one day and assembled the next day?

[crobjones2]

My block was cast on may 22nd and assembled on the 25th, I believe the norm is to be within a week of casting

[tmodel66]

My block was cast on the 23rd and assembled on the 26th so that's about the same as yours and my heads are 9 and 11 days off the block cast.

[wisemanz28]

Just checked my block, it has a casting date of August 22nd of 69.