I was lucky and ended up not having to find a one for conversion... found a great setup... '09 panel van w/70K on it, XL interior V10, Quigley conversion and full camp interior, less the pop-top. If I had gone with a diesel I would only want the 7.3.... and those are hard to find and can have a lot of miles on them... I think I did OK - except in the gas mileage department!