Any updates with your WVO research, design or plans?
I have been running the 2-tank Greasecar system in my 2001 VW Jetta TDI for the past 2 years. It has been a $ saver to say the least.
In adddition to that car, I'm currently looking for a 1995-1997 F350 SRW Crewcab with dual tanks. With what I have been researching, I'll use one of the stock tanks for veggie and heat it externally with coolant lines from the engine. Will also be using electric/thermal heaters from Fattywagon.com to pre-heat veggie fueline prior to injection pump.
Remember to ALWAYS purge back to diesel before shutting down at the end of your day or if it's going to sit (not running) for greater than 1 hour...depending on outside temperature.
Hope this helps you out and goodluck in your venture.
Oh, using heat and a centrifuge to clean your WVO will save you time and money in filter replacements.