Am I correct in assuming that all that is involved in a tune-up for these cars is a spark plug/wire change? Is there anything else that needs to be replaced, cleaned, tweaked?

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1995 GL Zetec MTX...Light Blue
Born: July 1995
Purchased: November 1997
KKM Intake
Superchip
AR 16x7.5 w/ Dunlop W-10 (205.50.16)
Viper 500+ Alarm
Sounds by: Pioneer CD/Polk dB/MTX Subs/Alpine Amp
Richbrook Shift Knob
"Recontented" Factory Instrument Cluster w/Tach
"Recontented" Foggies


Soon to be added:
FocusSport Wires (Blue)
Accel EDIS ignition
Autolite Platinum Pro's


1998 E0 SVT #3128, T-Red

2001 Infiniti G20t
1974.5 MG B GT