Well starting in the 73 model year all Motors were Chrysler blue Also called (Corporate Blue) But most of 1969 340 were blue. some early ones some were red. and as of April of 71 would have been blue Because of Model year change in June /July of 72. And they would use the Blue up to 83 on all except the 2.2 4cly they were Black. and on the early 2.2 blocks you will find a VW casting on the block because The Germans were making Volkswagens Blocks for the VW Rabbits And Chrysler