Oilseed, Oil, Meal and Biodiesel Cost Calculator

I've got an old, pre-70's dilapidated TroyBilt I'm gearing up to rebuild, largely for my own education on mechanics. Linkages are broken, fuel tank is missing, lots of work to be done so I figured why not rebuild it to run on biofuel. Not sure how well I'm navigating the site but I haven't found much on converting engines, biofuels, etc. to go off of.