Engine Identification!

HI!
The engine in my -64 valiant has been replaced, it´s still a 225" but i would like to know more.

On top of the block ( over the distributor) it´s says: I 225 R 1203 E
Under the intake manifold ( in the casting) it´s says: 330-3
6 1681 IF

I live in Sweden and english is not realy my language
so i apologize for any misspellings

Best regards
Mrroth71