[scuncio kid]

In 69 they ran a 3.47 stroke for 430 CI then in 70-71 ran a 3.76 stroke for 465 CI, You can also see the four extra hold-down bosses in the lifter valley. There also should be oil cooler provisions on the oil filter boss. That would be an early block that used liners cast from 356 alloy after 72 they were cast with no liners and was cast from 390 alloy