Look at the parting line on the crankshaft. A wide line that isn't in
line over the length of the crank, with grind marks means a forged crank
while a narrow line that runs inline down the crank is a cast crank.
The reason is because the forged crank is forged then the flash is
ground, then it is twisted into it's final shape while still hot, while
a cast crank is cast in shape, cleaned of sand and flash and then
ground. The twisting of a forged crank means that the parting line moves
on each throw.

--
Steve W.

> wrote in message
ups.com...
> Hi there,
>
> I have searched high and low for an answer to this question.
I
> recently have purchased a 1969 375hp 396 engine. A very rare engine!
> Now the only problem is telling if it has all the true internal
> components inside as I was told it had.
>
> Can anyone tell me if there are any visual differences between
> cast iron & forged steel crankshafts that will help me determine what
> is inside. If there are not any visual is there a way to tell...any
> factors I can look for?
>
> Any help would be greatly appreciated.
>
> Jeff Gerlitz
>



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