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http://fuelsforum.rasoenterprises.com/
there was a link somewhere there to a list of propane mixers. the impco 425 flows about 460 cfm- so 2 of them would be a little over 900- which would be about what youd want for a stroker, but unless youre revving hard it would be overkill for a 472. if youve got any questions that i havent answered you should be able to find the info there. also theres a guy there franz hoffman that you may want to buy his cd- diagnosing and troubleshooting propane powered vehicles. that cd should tell you whats wrong or what to look for if something happens to the fuel system.
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