Interesting. Text below is from the 5th gen service manual (GT engine). No mention of lifting the engine. Fairly simple task, according to the shop manual...
2. Spark Plug
A: REMOVAL
Spark plug: Refer to “SPECIFICATION” for the spark plug. <Ref. to IG(H4DOTC)-2, SPECIFICATION, General Description.>
1. RH SIDE
1) Disconnect the ground cable from battery.
2) Remove the air cleaner case. <Ref. to IN(H4DOTC)-8, REMOVAL, Air Cleaner Case.>
3) Disconnect the connector from ignition coil.
4) Remove the ignition coil.
NOTE: Turn #3 ignition coil by 180 degrees to remove it.
5) Remove the spark plug with a spark plug socket.
2. LH SIDE
1) Remove the battery. <Ref. to SC(H4SO)-26, REMOVAL, Battery.>
2) Disconnect the connector from ignition coil.
3) Remove the ignition coil.
NOTE: Turn #4 ignition coil by 180 degrees to remove it.
4) Remove the spark plug with a spark plug socket.
B: INSTALLATION
1. RH SIDE
Install in the reverse order of removal.
Tightening torque (Spark plug): 21 N·m (2.1 kgf-m, 15.5 ft-lb)
Tightening torque (Ignition coil): 16 N·m (1.6 kgf-m, 11.8 ft-lb)
2. LH SIDE
Install in the reverse order of removal.
Tightening torque (Spark plug): 21 N·m (2.1 kgf-m, 15.5 ft-lb)
Tightening torque (Ignition coil): 16 N·m (1.6 kgf-m, 11.8 ft-lb)
C: INSPECTION
1) Check the spark plug for abnormalities. If defective, replace the spark plug.