Twin plug heads
What you could do is drill/machine the heads now for the second plug while the heads are off and not wire it up this time around. Then you would be ready to go for the next time you open the engine or just change cams and chip.
Regards,
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2002 Porsche Boxster S Cobalt Blue/Blk/Blk
Crew Chief for Son's 1978 Porsche 911SC Original Porsche Mocha Brown 3.8L NASA race car
Previous Porsches: 1958 356 Red Coupe - 1972 914 Blue -1972 911T Coupe Aubergine
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