Thanks for the help FFR! The block came without any heads on it. They were used on the new engine put in the car so I never saw them. Upon close inspection at the crossbolt areas on the side of the block they all have that little recess around the bolts like the factory cast them. I really think this thing is an original crossbolt engine unless, someone went to the pains of replicating those recesses. This thing must be one of Fords factory mistakes, or actually bonuses! I do want to check the core though to see what it is. I guess I shouldn't be looking a gift horse in the mouth since I got the block for free but, its nice to find out what I have. Yeah, I got it for free from someone who was going to throw it out as scrap. I guess even a blind squirrel finds a nut every once in a while Thanks again for all the help!!