I had always thought the same thing, but was looking at the well published picture of CSX2063 (on Pg 28 of Trevor's Cobra The Real Thing) and noticed the disc brakes were in front of the wheel spindle like the Ace, and the wishbone mtg points were on top of the tube. Pictures I have seen of MkII Cobras have the wishbone mtg points slightly outboard, and the disc brakes located behind the front wheel spindle. Based on this, I was thinking the front suspension was the same, but have seen reference to the front leaf being different and so am not sure about the pieces or geometry. The reason for the question is an Ace owner is trying to source some suspension components and is considering using some Cobra parts as they seem to be more readily available. If the Early Cobra is the same as the Ace, it may open up more options to him.
Jay