SMALL BLOCK VALVE COVER ID

mbaird said

6 pak covers are the same as 318/340 for 70. Nothing special .

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Actually there is a difference between the 6 pack valve covers and the other 1970 small block ones. It takes a good eye to spot the difference.
Check out all of the different small block valve numbers in the 1970-71 parts catalog.
The first column is 318 engines and the second column is the 340 engines.
A little crazy...