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All rotaries have 4 spark plugs
2 Trailing (TOP)
2 Leading (LOWER)
The Leading are waste spark type, both plugs fire at the same time, so there is only one coil.
The Trailing fire independently so there is two coils
for a total of 3 coils for a stock 13B
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93 Half-BP,GT45,2XOil Coolers, Front Mount,ACT Pro lite Flywheel-Pressure Plate, Power FC w/Datalogit, 850pri/1600sec, 2XFuel pumps,HI-6DS for 2-Step Currently 500HP@16psi 1976 Cosmo Rx-5 5 Speed 13B
"THE" South Texas Rotary Builder PowerFC/South/New Member MOD
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