On my 59 Ferrari the spark generating capability was so poor the gap on the plug was barely the thickness of two business cards...the narrowest gap of any car I have worked In IIRC.

On that car there were two distributors each firing six cylinders. Each distributor had two sets of points firing three cylinders. The ramps on the rotor were very gently sloped so that the points would not float at high rpm. The only drawback to all this impressive hardware is that it is very possible to get one distributor too advanced and the other too retarded.....don't ask how I know.

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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.