Thunderbolt IV 502 ignition module
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Thunderbolt IV 502 ignition module
Mercruiser Thunderbolt IV 502 2C05A V8 20R I used it last year, sold engine without it.
$175 also have the 454 module v8-24 and distributor and harness fs seperate.
$175 also have the 454 module v8-24 and distributor and harness fs seperate.