I've had good luck with a conversion kit for my Ventura when it had the 350. So when I put the 455 in it I ran their distributor and coil, it ran good for 6 months and after that I had problems all the time. The last straw is when I crank it up at a car cruise and it sounded like a cannon going off through the exhaust. I put a MSD in it and it fired right up all the time.
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