Hemi Exhaust Manifold Foundry Mark

I have run into a wall trying to decipher the date codes on my Hemi manifolds. So, I am going to try a different route. This is what I believe to be the foundry mark looks like on mine. Does anyone have a manifold with this foundry mark that is more legible? If we can identify the foundry mark, maybe I can round up the foundry and get some info. I don't believe these were made by a corporate foundry as it seems corporate used the month-day-year format. We are going to skin this cat somehow.

I think the set I have has the same markings. I will need to get a picture of them.

These marks are on a passenger side manifold that appears to be a 1971 part, possibly a very early variant based on it having had a functional best rider .... The driver side is a 1966 YM manifold . ::.

I'll try to get some pictures of mine tonight and post them.

I got a pretty decent one from the one manifold. It looks like FCF and like a P or something like it at the bottom of the triangle. Finally got the thing attached!

Wow, that's great. The hunt continues.

Falk Corporation Foundry Milwaukee Wisconsin?

Then what ?

Another piece of minutia added to the data base.

I'll pursue that lead, it looks like a good candidate. Thanks!!!!

Unless someone who worked at the foundry comes up and tells you there dating method it is going to be near impossible I think. Look at the marks on power steering pump housings. Who knows what it all means.

You may be right. But I am not ready to abandon ship just yet.