Reproduction 351-4V AT / MT Emission Decal for the 1969 Mercury Cougar / Ford Mustang. We just sorted these out as of 7/8/2024. The H and M code 351 engine decals have been identified incorrectly since these reproduction decals were created.
575rpm for automatic and 675 rpm for manual transmissions is correct for M code 351W-4V engines in 1969.