1965 Valiant 200 convertible (minor project)

65 Cuda 340 said
Is "1490" the block date code? Maybe Sept 14, 1980?

And the "330" doesn't mean a "30" forged crank block like someone posted on another forum?

That would make more sense than a 1979-80 head on an earlier forged crank block.

Curious. Seems to be hard to find good info on the late slant six stuff.

The 1490 is the 149th day of 1980. I've seen forged and cast cranks in all years of blocks. Generally the forged cranks were in trucks and vans with manual transmissions, but, even that isn't etched in stone.