#1 - I expect you'll have to modify something - either the neck pocket or the neck heel. A strat heel will fit a tele pocket, but not the other way around. Reshaping the neck heel is probably easier than the pocket.
#2 - Everything I've read says that on a 25-1/2" scale length, the studs should be at 25-1/4" - so for 24-3/4" they should be at 24-1/2", or 12-1/8" from your 12th fret. If your stud holes are at 12-3/8", you could reshape either the neck heel or the neck pocket to claim back that 1/8" gap, and you'll still be out by 1/8".
My best guess would be that the stud holes and trem rout have been drilled/routed for a 25.5" scale length. If you leave the studs out, how much farther forward can the bridge move? If there's enough wiggle room, you might be able to get away with doweling the existing stud holes and redrilling them.
But there's also the question of whether or not you ask about returning the kit. The refund policy is pretty generous, but return shipping from Boston to Australia might set you back a bit. I think it's definitely worth shooting Adam @ Pitbull an email with your concerns, if you haven't already done so.