413 vs 440??

i just got back from looking at the engine. I got these numbers 3.28.74
3830930 440-6 and on the cylinder head 3769902. the guy said it came out of a chrysler new yorker. i tired to check around for these engine code 3830930 but it didnt seem to match up with any of the codes on quite a few charts i checked online. if u have any info on this gimme a shout. thanks