I have 1974 142S with B20F. The fuel injection has been removed and a Weber carburetor installed. It also has IPD Street Performance Cam. I have installed 123 distributor and don't know which setting to use. From the chart it looks like the setting for B20A is closest since that engine is carbureted. There is a big difference in the timing. I have tried the setting for the B20A and also the B20F. I would appreciate some suggestions on which setting to use. BTW, I have 123 distributor on my 67 122S. Compression ratio is 10:1 after rebuild so I used B18B setting and it really screams.
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