how do i change the spark plugs for a 65 jgalaxy?

Changing the plugs wont keep engine from starting unless when he replaced the plug wires he didn`t put them back in order they needed to be ....will need to find out where plug wires went to on the dist cap and to each cylinder ....common problem each wire has a certain place on distributor cap and goes to a certain cylinder on engine

bg
February 2006