1966 427 4 bolt standard bore block casting number 3869942 dated E-17-6 with front pad stamped T05254D 6J276888. I believe this is a 425HP out of a passenger car but was mistamped from the factory and was intended to be a suffix code of ID. The block was cleaned and magged and I have the original pistons and rods out of it and believe it can still stay standard bore $4000. 1967 3919840 square port heads freshly rebuilt and dated E-24-7 and F-7-7. The heads are ported and have 2.25 intake and 1.88 exhaust valves and are stainless $2000. I can ship these parts if you cannot pick them up and can be reached at 330-770-2517. I can send pictures as well with an email address.