Help me with this odd ball....

Thats what mine is also! 6-13-65 440 block. Mine has LY rods and old flat top trw forged pistons. Im just beside myself that , to my knowledge its never been balanced, but it has drilled counter weights. I guess ill break it all down and bring it to my machine shop and have them check the balance. Im just happy its forged. All these years ive been scared to spray it because i thought it was a cast crank! Lol