Extra oil passages-early 340
In the current issue of Mopar Collectors Guide, a gentleman stated that his 6-67 date coded 340 block has 4 oil passages in the valley, instead of two. Two of them are capped off. My 6-67 block is the same. I'm now very curious as to why they were cast in. I wonder if Mopar had other oiling designs on the board in the early years?