I am looking for the original 340 block for my 72 roadrunner. I got the car out of Seattle Wa. When I got it, someone had replaced the 340 with a 360. The car was originally Richard Petty blue with b5 blue interior. It is a pistol grip 4 spd car. Someone painted it gun metal silver and changed the interior to black. The car was built in 10-71, so I assume the date code on the engine block might have been from June to Sept. 1971. The engine stamp would be 2G126612. Any help would be appreciated!