Well, maybe one more time
Splines don't have an i.d. and an o.d., they have major diameter and minor diameter. They can fit on the major diameter, the minor diameter, or on the side. But you don't want to make them fit on two of the features, just one.
In general, straight-sided splines are a major diameter fit. That's because grinding the o.d. of the mating shaft is easiest. If it's a minor diameter fit you can often tell because the roots of the male splines will be ground. As you can imagine, that's a lot more trouble and a lot more expensive so you don't see it often.
Side fit is usually for a permanent fit and you don't see it much.
For a sliding fit, there is class A, B and C. Basically that's just the amount of looseness.
Looking at the numbers here, I'm going to go out on a limb and say this is a loose major diameter fit on the .872 feature. That would follow normal practice. That would make the major diameter of the female spline about .875.
My criticism would be, your print has a .001" fit on the minor diameter. I do not think this is what Bridgeport intended and you could end up with the dimensions fighting each other. I don't have spline fit info handy but I'd make that minor diameter a good .015-.025" clearance. Maybe more, because unless they used an undercutting cutter on the spline, then the corners will have a radius and your pulley could hang up on the shaft. If you want to make it strong (why ? I guess it's a fixation with me !) just make that a nice radius. The smaller diameter on the shaft doesn't matter as much as the sharp corners do for life expectancy. Within reason, of course.