Yeah, but you can put either style head onto either a cast crank block or a forged crank block. You can't see which crank is which when it's in the car or truck. Unfortunately "numbers matching" isn't as important to a /6 car's value as it would be an original Hemi car.
It'll run fine with either the 72 or the 77 block, I have a drool tube head collecting dust you can have if close by (Chicago area, about an hour south)my 74 head looks identical to a 72 head.