Hey Hemidude426, before the rebuild, did the engine have valve reliefs in the pistons and a 3 bolt cam? The lifters were special too. How did you rebuild it? Just a rering or new pistons. The oil pan rail will have some of the vin numbers on it and people like alaskan t/a Barry might could tell you if it has numbers close to known 6pk build series. What are the numbers on the block side by the pan rail? I myself am interested. Complete it is worth quite a bit especially if a known machinist had built it and can verify the parts installed. Does it have the 6 qt oil pan? If it is all date code correct and fresh, prob close to 4500 to 6k in ready to run form. Did it have a 1/2 inch pick up tube? The crankshaft will have a specific part number also. As I recall