Bennet, I have the same setup that you're using. I used the stock (basic) springs for the mechanical advance, the lighter springs allow the advance to come in sooner. The stock springs work best for our 6 cylinders as advance doesn't need to build that quickly.


~ Craig
1958 Viking 4400
"The Book of Thor"
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1960 Chevrolet C10
"A Family Heirloom"
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'59 Apache 31, 327 V8 (0.030 over), Muncie M20 4 Speed, GM 10 Bolt Rear... long term project (30 years and counting)

If you don't like driving yourTruck, you won't drive yourTruck..| Living life in the SLOW lane