Nickel in blocks???

[camarojoe]

Let me start by saying i don't know anything about this topic, nor am I taking sides on the matter...but from what i can tell the images simply show changes to the outward appearances of the blocks over the years, small casting details, etc... How do any of the photos show the actual composition of the iron the blocks were cast from was ever changed? From what I can see, they don't. It would be like posting pics of 67 and 68 camaro fenders and saying because there are outward visible differences, the composition of steel itself must have changed.

[70 copo]

Originally Posted by camarojoe

Let me start by saying i don't know anything about this topic, nor am I taking sides on the matter...but from what i can tell the images simply show changes to the outward appearances of the blocks over the years, small casting details, etc... How do any of the photos show the actual composition of the iron the blocks were cast from was ever changed? From what I can see, they don't. It would be like posting pics of 67 and 68 camaro fenders and saying because there are outward visible differences, the composition of steel itself must have changed.

Thank you Joe,

Have a look on the 1969 .20 block under and to the left of the cam gallery and leading to the top of the crank gallery. this is a defined bulge with a crease.

Next look at the 1969 .20 block this time at the more pronounced bulge present above the cam gallery to the right and up to the head deck.

Why is that significantly structurally different from the 1973 block with the same casting number?

So the question Joe is; do you think that the differences in the image are just the the composition of steel that has been "changed"?