Spark Plug Gap

Spark Plug Gap 4.0L v6 1.32-1.42 mm (0.052-0.056 in.)
Spark Plug Gap 4.6L v8 Early Build Black Coil Boot 1.15 +/- 0.13 mm (0.040-0.050 in.)
Early Build 4.6L 3 valve V8 Spark Plug Gap is not adjustable
Spark Plug Gap 4.6L v8 Late Build Brown coil boot 1.05 +/- 0.05 mm (0.039-0.043 in.)