yes it is a nascar motor, I confirmed with the original owner yesterday. he is trying to find his original reciept. I posted some of the part #s, here they are again. on the block right side front inverted 87 352, on piston sidewall front right 12 DIP, inside
oil gallery 427 26, on rear of block P 66-427, pistons C5AE-6110-AU, heads C4AE 0D10 6090F , other head C4AE 130 6090F, intake valves C8AX-6507-A, exhaust C8AX-6505-A. the short block came assymblied and I don't want to touch it. will see if I can get #s off the rods without taking the bottom end apart. the intake must be a marine tunnel wedge, but was for medium riser heads.