.035 inch spark plug gap for a 390 V8 in a 1973 Ford truck ( according to www . motorcraft . com - no spaces )
A 1968 Ford Galaxie 500 with a 390 engine should use a spark plug such as an E3 brand spark plug. This plug should have a tapered seat with 18mm threads.
fordparts.com shows the 1967 Ford Mustang 390 cubic inch ( 6.4 liter ) spark plug gap as ( .035 inch )
.044 inch
When changing spark plugs on a car, it is important to have a diagram. For a 1969 Ford 390 V8, a person can find a spark plug diagram in the maintenance manual of the car.
Points .017 and spark plug .035
Ford uses Motorcraft Spark plugs on all there vehicles.
According to one of Fords websites : For a 1967 Ford Galaxie , 6.4 liter / 390 cubic inch V8 engine : ( the spark plugs are gapped at .035 inch )
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front
( .035 inch ) is the spark plug gap
The spark plug firing order is ( 1 - 5 - 4 - 2 - 6 - 3 - 7 - 8 ) The distributor rotor turns COUNTERCLOCKWISE The marked # 1 position on the distributor cap faces to the REAR and slightly towards the drivers side The engine cylinders / spark plug locations are numbered : firewall 4 - 8 3 - 7 2 - 6 1 - 5 front For a Ford 390 cubic inch V8 engine
Yes there are freeze plug(S) on a ford 390. There is more then one on each side though I don't recall how many, I believe there are 6.
Check the local flea markets for Haines or Chiltons manuals. Anything large and Ford from that era will do. Pick-up, Galaxies, LTDs, Torino, etc. Say from 1963 - 1980. The spark plug wiring will be the same on any of their 390s. Good Luck. Great Engine!!!