The spindle length is different between track and road BB. But, you will need an ISO taper spindle for the Sugino 75 which means the Sugino 75, Sugino 68, or a Campagnolo BB (or some vintage options: TA, Gipiemme, OMAS, etc.). The closest sealed BB to the 109.5mm spindle of the 75 BB is a 111mm Campagnolo. You should be able to find the Veloce 111mm BB for around $30-40 and should get you close to a straight chainline if the Eno has a standard 42mm chainline.