It should be on the passenger side of the radiator in the back (engine side) by the lower radiator hose. It is possible that it is on the driver side as well. Regardless, it will either be a white or black plastic threaded plug, or it will be a draincock which looks similar to a wing nut.
If it's a 8 cyl. the plug firing order is 1-8-4-3-6-5-7-2 and the distriburetor rotates clockwise, your plug order is, starting on the drivers side the plug closest to the radiator 1-3-5-7 and on the passenger side starting at the plug closest to the radiator, 2-4-6-8
if you have a V8 the firing order is 1-8-4-3-6-5-7-2 and the distributor rotates clockwise. The #1 plug is on the drivers side closest to the radiator, plugs on the drivers side are numbered 1-3-5-7 and the passenger side is 2-4-6-8 with #2 the closest plug to the radiator.
It is located on bank 1 which is driver side...now it will be the second spark plug closest to you...order is on driver side 1,3,5,7 which are odds.the last spark plug at the fire wall is 7 and at the front of the vehicle is 1...Passenger side bank 2 are evens 2,4,6,8......