Reporting back on the valve stems. The Grainger N-1600 Haltec aluminum valve stems worked perfectly in my main 4 TT wheels. The spare had the stem hole at the edge of a radius like JBarca mentioned, so on that wheel I used a short re-inforced rubber/brass stem since it is a spare. All the stems went in without issue except for one wheel that would leak whenever the stem was being tightened. It turned out that particular stem had been installed incorrectly with the small metal part on the outside of the rim installed upside down so that it didn't seal down over the rubber piece coming from the inside of the wheel. Thanks again to all who recommended these stems.