is this a good deal???

no, IMO
you bike will still only be worth little more than that $1200+
 
it doesnt even include a piston...add $80 - 100, nor the boring costs, add $40-55
you can have a builder on here do the same work for way less, and piece the other supporting mods together for further savings
 
Just FYI, I had OConnor Racing build my top end, and it was under $ 600.00 for everything. Gaskets, piston kit, all machine work, shipping....the works. You can find a good used carburetor for $75.00 or less with some looking. Good deals are out there on pipes, too. Bottom line is, if you get O Connor Racing or Flotek or Wildcard Racing or another local builder to do your engine, you can put together a whole package (pipe, reeds, carb, and all) for right at or slightly under $ 1,000.00.
 
Agree with above, any of the builders on here could hook your motor up, for much less!

Then piece everything together save ya some cha-ching!