'S'tuff1979

So i was looking at those pictures from craigslist of the Ram Rod engine and i noticed those casted numbers they put in the picture are the same as the ones on the front of my block. #395558 2 the only problem is i have number 6 heads. I was wondering is that a ram rod block? If so, does it have anything going on with the block or the pistons that can be useful? Ive always thought the pulley/balancer on this car is gigantic on the Crank bigger in fact than the one in the picture on craigslist. if i do have the rr engine should i look for some #5 heads or what?