6.2L engine conversion possible?

Hey there, I am currently looking into buying an 84' 6.2L engine diesel G20 chevy van. Can I convert this to run off veggie oil? and what system do you think would work best with this vehicle?
Any advice/help would be much appreciated!
(emailing me with this help would be even more so! My email is laurenchain@gmail.com thanks! thanks! thanks!)

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