Pablo,
I don't know why I was browsing the Aussie e-bay, when I've got way too many cars anyway, but came across a unique vehicle, possibly well suited to your biodiesel adventures.
It's an Aussie XA Ford Falcon (the same model as the yellow ones in Mad Max), fitted with a Perkins diesel.
Given that it's still only $1100 U.S., it might pique your interest.
http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=2470683383&category=47364
I don't know why I was browsing the Aussie e-bay, when I've got way too many cars anyway, but came across a unique vehicle, possibly well suited to your biodiesel adventures.
It's an Aussie XA Ford Falcon (the same model as the yellow ones in Mad Max), fitted with a Perkins diesel.
Given that it's still only $1100 U.S., it might pique your interest.
http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=2470683383&category=47364