1963 B-414 Pos-ground vs. Neg-ground?? Confused? in Technical IH Talk Posted February 15, 2019 A few items about the B414 gas . Yours is probably built somewhere around February 1963. Mine has a build of April 1963 on several of the castings and probably assembled in May 1963. The B414 gas was first introduced in the USA in 1962 but was not introduced in Canada until early 1963. Yours probably came in the first boatload in 1963 and probably was landed at Halifax in April 1963. Mine landed in Montreal somewhere in June -July period. It was shipped out to the dealer in July and I first saw it there at that time. We bought ours after negotiating for a month or so in November 11, 1963. Good rugged little tractor.