In addition to what Roy said,
In addition to what Roy said, I'm a little worried about how high the seat would be. You want the seat to be at inseam - 3" or lower.
To expand on what Roy says, you can't use disc brakes with a conversion kit because (1) you need to turn the fork around and (2) because even if you tried without turning the fork around (which is a bad idea), the wheel is no longer centered where the brakes are expecting it to be centered.