converting a f250 7.3 to wvo svo with a second tank

can anyone help me? i have just over a 100 k miles on my truck putting approx 25-30 miles a week i cant imagine paying 3500 for a dna system but also cant afford to pay for costly repairs if i screw up on a backyard diy system..

is there a site or an affordable system that I should check out? I have been on blogs for hours and cant find the answer. I am not a much of a mechanic I can do the simple things (brakes, alternator, filters etc.

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