Slant Six engine numbers issue

Hi! I finally have my Dart back with me, and i wanted to focus on the engine.
I have searched these and the SS forums for answers and i am still in doubt about my slant six's origin.

The numbers under the alternator say: FW225R L 3066 0643
wich tell me it's a 225 BUT the fender tag says: LL41B08178867
wich tells me it's a 198 engine. The engine has never been swapped before. Should i just assume this is an error? or am i wrong? this car is very confusing.

I attached some images in case i am getting something wrong, this is my first Slant six.

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