Hey ya'lls. I have a Impco 425 carb and two other thingys. One of them flows water and gas through it and the other has a VFF30 number cast on the top side. What are these things? Is there some diagrams or instructions for installing propane I could get? Also, what kind of fuel lines/hoses do I need to buy? Do they have to be special? I'm building a propane 400 motor for my 67 f100 4x4. Thanks.