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The last 360 I built was 10 to 1 and it had 240psi cranking. Also had a 508 purple shaft. Never had any issues running 97. It ran 12.40's in a 68 dart with a stock convertor and 3.91's.
Where do you get 97? Or did you mean 87?
based on their profile location listing, I'm guessing they're in canada. I think their gas is rated by MON only, instead of the US standard of RON+MON/2 average....
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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