The Classic Sugino Mighty Tour crank was indeed used on many bikes as a triple, but, it was a 110mm pattern with long fixing screws and 5 spacers. I own and use two of them. Like every thing else in the bike world, they may have drilled and tapped the spider for 74mm at a later date, but, I am not aware of it.
Dickey Greer
West Monroe,La USA