Big Block Truck Headers/Exhaust manifolds
IIRC my 318 has a rear pickup and pan.
How can you tell which end is the front or rear on a big block oil pan?
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Rear sump BB pan will have the drain plug on the back of the sump. BB pan bolting flanges being square with the exception of a divot on the
front passenger side. Here's an example from a 187 pan.
I may have a pan & headers also if needed.