[paulcortright]

I have a 66 galaxie 7 litre, how can I tell if it has the original of if it is a 428 C6ME-A on the block near the front, 7D20 next to oil filter, 352 on the back under bell housing, the engine is black in color

 

[PSIG]

Offhand, based on the date code (April 20, 1967), it is not the original engine.

David