However, the distributor cap's numbering doesn't directly correspond to the engine's physical cylinder arrangement. The firing order dictates the position. The firing order for the Ford 200 straight-six is typically 1-5-3-6-2-4.
Therefore, number one on the distributor cap will correspond to the position for cylinder #1 in that firing order. You'll need to locate the number "1" on the distributor cap itself, and that's the location for cylinder 1's spark.