system i bet.

only two things i remember ever doing to those:
1. replace the injection points that reside under the ignition points. they send electronic signals to them to squirt.
2. cleaned the rotary points with a pencil erasor.

that is all my expertise from running a 75 opel sportwagen and a 74 saab 99. my saab 99 (80) had the later style i think. more reliable but less guts.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.