Quote:
Originally Posted by tubman
I can tell you that it makes a difference. I have a 1967 Corvette with the 350 HP 327 ci engine. After a full restoration and engine rebuild, the engine would not reach the yellow zone on the tachometer (5800 RPM). After a lot of research, I discovered that AC/Delco had shortened the tip in the rotor .060" in 1973 to reduce emissions. This rotor became the de-facto replacement for all GM distributors from that period. A search found a firm that was making replacement rotors with the original tip length. After installing one of these rotors, the engine would rev to the red line (6000) with no problem.
I don't know how this translates to early Fords, but it made a big difference in my Corvette.
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In actuality the "E" rotors required a different coil , and used very little extra voltage but the rotor index was off a bit at high rpm. A bad idea from GM but got them past the noise police etc.....
