I only post this question after researching here and beyond. Simply put, how do I adjust the dwell on my '54 3100 with original six. PO switched from 6 volts to 12 volts, but still running 6v coil. Also, published dwell angle is 38-45. Is anywhere in this range ok, or is there a more accurate recommendation?

Finally bought my uncle's 1954 3100 that has been in the family since new.