Greg...
I will reverse engineer this log for you.....
Paneling vertical, and wanting ten feet coverage is tough to get with milled wood. ESPECIALLY if you plan on butt joints. Not so much if it would be board-and-batten, or board-on-board.
If you really want butt joints and would consider my architectural advice-
Consider using the "seam" to your advantage. Use real wide planking vertically as a Wainscoating, possibly B & batten, a milled Chair rail, and then above go horizontally with slightly different plank width or vertical again with narrower, butt jointed.
I agonized for two years on my lumber, red and white oak, hickory, how I would utilize it. And then said EFF it, I used all three styles..... Rustiic as can be, and I wouldn't change a thing.
NONE of it got run through a mill, a planer, or even a table saw. How it dried, is how it got nailed. Square cut the ends to lenght and shoot it into place.