340 date codes

I have a 1970 Dodge Dart Swinger 340 4 speed car. I am wondering what casting numbers i need to look for in order to get a matching numbers block? The scheduled production date compliments from my fender tag is 2/18/1970. I would also like to find date coded heads, intake, carburetor, transmission everything; are there any good sources available online that will tell me all this information?

Thanks