I am not surprised that this works well, since 14-34 was a very common Nishiki 5-speed freewheel during the 1970s, and the SunTour VGTs of the day handled it with aplomb.
What really surprised one of my coworkers was that the old VGT I gave him worked well on his daughter's indexed Shimano 7-speed setup, better than the original Shimano she had destroyed in a crash.
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069