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does anyone know if a 1980 cj7 would have centrifugal or vaccum spark advance?

life is like my jeep, when everything's goin good, you just know somethin's goin down soon
 

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Should be vac and centrifugal. Timming I believe was 8degree btdc. But with any mods your best timming maybe slightly different. I used to have to run 18, yes 18 btdc on my 304. There is also a question to whether or not the harmonic ballancer timming mark can slip. Due to the rubber spacing. People have said 18 is too much but after looking at it changed their mind.

Pigpen
76 CJ5 360/T18A/Bronco gear D20/D30 big brake disc, locker/D44 big drum working on disc/ factory slip/4inch lift/33's/6000lb winch/All Fiberglass/electric fan/full cage/ appetite for MUD
 
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