Metra Ford/Chry/Jeep 1974 99 "oil air filter" Questions

...air filter, relay, and coil pack(i am not sure what all may be significant) so far, and it is still misfiring. We have also switched cylinder 1&2 plugs and wire, which would mean it would say ...

...oil change semi synthetic,water pump,radiator,thermostat,head gasket,air filter,cabin filter and last of all 7113 spark plugs x 4 with a bill of Have just lost my job and can not afford to send this ...