Dakota,
You oughta pose this question to St. George on the Historical Forum, he probably has the info you're asking for.
A question,; What do you mean by split front boots, are you talking about scalloped tops? If so, I don't think they came in to real use until around 1880 or so, and mostly by the wealthy mexican land owners.
If they are cavalry boots they would have the slanted tops (slants from front to back). Most were square toed/ with flat heels, used from the civil war through the Indian Wars. Matter of fact, French Jack and I just picked up a pair (for him) from Fall Creek Suttlery today for $175.00 and they make their own boots.
As far as saddle pants, they would have been sky blue wool, and yes they were issued to the northern mounted troops during the civil war, I'm not sure about the confederate mounted troops. I'm sure, you would have been able to keep a lot of your issued clothing if still in servicable condition. I hope this helps, but I would ask St. George.
Sounds like you got this thing pretty well figured out, are you writing it down as your documentation?
Bill