I installed this igniter and matching coil on my newly purchased 1957 Chevy 235 Inline 6 pickup truck. I ran the engine with the traditional dots first and found it worked well. Then I put Pertronix on top and it worked 100% better. The motor has been rotten for a couple of years but with the Pertronix system all the chatter and chatter is gone. I didn't give 5 stars because the instructions are very lacking.
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