64-73 PLUG AC the plug is steel is black like the autolite ones used to be like
Before they change to silver this is an equivalent plug to a MM45 sold as X1 

Please remember this is the 18 mm plug and usually only fits most Mustangs up to 69
If you have later or aftermarket aluminium heads this will not fit he will need the smaller later plug

Sold separately so you will need 8 for a V8 OR 6 for a straight six
Resistance 2000
Ground Configuration Projected Tip
Center Electrode Core Material Copper
Center Electrode Tip Material Nickel Alloy
Gap Size 0.044 in
Gap Size 1.120 MM
Ground Electrode Quantity 1
Hex Size 13/16
Manufacturer Heat Range 3
Seat Type Tapered
Reach 0.44 IN
Reach 11.13 MM
Thread Diameter 0.551 in
Thread Diameter 14.00 MM
Alternate/OEM Part Number(s): 05613110, 19310640, 19362244



AC 428 1967-1973
DETOMASO MANGUSTA 1970-1972
EDSEL CORSAIR 1959
EDSEL RANGER 1959
EDSEL VILLAGER 1959
FORD 300 1963
FORD BRONCO 1966-1986
FORD CLUB 1958-1959
FORD COUNTRY SEDAN 1959-1974
FORD COUNTRY SQUIRE 1958-1974
FORD COURIER SEDAN DELIVERY 1957-1960
FORD CUSTOM 1958-1974
FORD DEL RIO WAGON 1958
FORD E-100 1969-1982
FORD E-150 1975-1985
FORD E-200 ECONOLINE 1969-1974
FORD E-250 1975-1986
FORD E-300 ECONOLINE 1970-1974
FORD E-350 1975-1985
FORD ECONOLINE 1967
FORD F-100 1965-1983
FORD F-150 1975-1985
FORD F-250 1965-1983
FORD F-350 1965-1986
FORD FAIRLANE 1958-1970
FORD FALCON 1962-1969
FORD FALCON SEDAN DELIVERY 1962-1964
FORD GALAXIE 1960-1974
FORD GRAN TORINO 1972-1974
FORD GT40 1966-1969
FORD LTD 1965-1973
FORD MAVERICK 1971-1974
FORD MUSTANG 1964-1973
FORD P-100 1968-1973
FORD P-350 1968-1976
FORD P-400 1975-1976
FORD P-500 1975-1977
FORD PINTO 1972-1974
FORD RANCH WAGON 1958-1974
FORD RANCHERO 1967-1974
FORD SKYLINER 1958
FORD SPRINT 1963-1964
FORD SUNLINER 1958-1960
FORD THUNDERBIRD 1959-1972
FORD TORINO 1968-1974
FORD VICTORIA 1958-1959
LINCOLN CAPRI 1958-1959
LINCOLN CONTINENTAL 1958-1972
LINCOLN MARK III 1968
LINCOLN PREMIER 1959
MERCURY BROUGHAM 1967
MERCURY CALIENTE 1964-1966
MERCURY CAPRI 1971-1972
MERCURY COLONY PARK 1958-1974
MERCURY COMET 1963-1973
MERCURY COMMUTER 1958-1967
MERCURY COUGAR 1968-1973
MERCURY COUNTRY CRUISER 1960-1963
MERCURY CYCLONE 1964-1971
MERCURY MARAUDER 1964-1970
MERCURY MARQUIS 1967-1972
MERCURY METEOR 1962
MERCURY MONTCLAIR 1959-1968
MERCURY MONTEGO 1968-1974
MERCURY MONTEREY 1958-1972
MERCURY PARK LANE 1958-1967
MERCURY VILLAGER 1963-1967
MERCURY VOYAGER 1958-1966
SHELBY COBRA 1963-1968
SUNBEAM TIGER 1964-1966