If they are all fuel tractors, they should each have two fuel tanks, one large tank one small tank, if the tanks are missing (which they often are) there should be two filler holes in the hood for the tank necks to go out of. Also there will be a Hole in the dash with the letters F, G, O, on it, for Fuel, Gas, and Off, that controls the fuel flow with a lever that comes out of the Dash, The 630 is considerably rare with 181 built if it has a Waterloo English Serial number, if it is a Mexican Spanish serial number they are not worth near as much and arent quite as desirable, the 430 is 1 of 88 Built, If the 630 is an all fuel, one clue would be that it would have a one piece manifold rather than a 2 piece. They also have a different numbered carburetor, fuel lines, fuel tank brackets, etc. Maybe you can post some photos? To find out what they are worth, list them on eBay. You will find more buyers for them there than on here. Good Luck!..Harlan Kruger
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Today's Featured Article - Fabrication (Who Me? Make it myself?) - by Chris Pratt. First of all, what are the reasons for not fabricatin your own parts? Most judgements on what should be purchased rather than fabricated stem from: Originality - If the tractor restoration is to be 100% original, it is likely that you should spend the time and money to locate the component in the used or New-old-stock market. Since this can be extremely difficult, you may want to fabricate the item or purchase a modern replacement temporarily, but eventually, you s
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