Ford Data plates

[Tony Smith]

I have seen a few variations of the Ford data/shift plates. On some, there are changes in the data or artwork. These two plates come from a 13 Cab F60L (top) and a 13 Cab F15A (bottom). The F15A plate says the spark plug gap should be 0.025 and the F60L says 0.030! Does anyone know why there is 2 specs and when did the change occur? The Maintenance Manual MB-F1 shows a gap of 0.025.