Just bolting on a performance coil is not aways going to show a lot of gain or increase in performance unless you make other changes. One of those change being that the "DWELL" will have to be increased to allow the coil to saturate more or build-up more power between firing.You can increase the Dwell on your single pt. distributor but there are limitations. That's were dual pt. and electronic distributors really start to shine.Also if you increase to coil out put, you will have to richen the carb or increase the number of carbs.Many people increase the coil output and the motor starts to "ping" and they retard the timing to elimate it , which usually causes a decrease in performance. Actually the "ping" in this case is caused from a "lean" condition. Icreased fire-power means more complete fuel burning so up-sizing the jets is the thing to do. Paul
