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: : : : : I was wondering if anyone had any information (from the factory) for engine replacements. I'd like to have information showing the 336 and 403 engines as replacement engines for the U and other tractors then they would be legal in Division II with the bigger engines. It would be nice to be able to use 220 pistions in my Z and still be able to pull in Division II. I'm a little short on hp in the 5500lb class on a good hard track the DC and CC cases with the 4" pistions and a propane head have a little more power. : : : TC & MM tractor and pulling!
: : :>Link : : Where can I find the NATPA rules? I havent : : seen them published in the Hook for a couple : : of years. At that time I didnt see anything that
: : prohibited using 403 blocks on a U. I visited the : : above link and they dont have the rules there
: : either. I have never been to an NATPA pull
: : because I dont know if my tractor is legal. : The 403 is legal in division III, IV, V but not in I and
: II if their is information showing the 403 engine
: as a factory replacement engine for the 283's I : think the 403 would be legal for division I and : II. : I'm sure your tractor is leagal, it is just a question : of what division you would be in. Here the NATPA
: will let you get away with alot the first time.
: They just tell you what needes to be changed for : the next pull they wont let you break the rules : the secound time. My 21-32 was having problems : meeting the drawbar hight, their rules for division I
: only alow a 16 inch hight and my 21-32's is 18 but : I found out it is at the point of hook and you have to : use a clevis so I was able to make the drawbar hight
: but the cement in the rear rims is illegal. : I don't know of a place on the net that has the : rules and a frined has my copy so I can't give : them to you. The NATPA home page has shown the : rules befor but they werent their very long. : I'll see if I can find sout some information. On the NATPA home page there is an e-mail address for the NATPA secretary. If you e-mail them and request the rules they will try to snail mail you a copy. Bear in mind that the NATPA is a national organization and they get many requests a day so it may take a while for a response, but they are wonderful people and will try to help.
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