I have a 3999289 4 bolt standard bore block dated J-7-71 stamped T1202LO for a 1969 427-430HP M22 corvette. I have the correct 7115 standard 427 L88 crankshaft, 3933198 aluminum L88 intake dated 6-29-71 and the 3946074 aluminum heads dated 11-5-73 and no date on the other one complete and stock. I also have the 3994026 square port heads both dated I-9-71. I will sell with either set of heads desired and if wanted I also have the 3919840 square port heads as well for 1969. I would like $6500 with the aluminum heads set up and $6000 if somebody wants to go with the #026 or #840 square port heads. Nice rare set up and the next best thing to the original motor. I have pictures of these parts if interested can be supplied with an email address. Serious inquires only and can ship if you cannot pick up.