loads of guys in the westfield club have done this its tried and tested. Works perfect on VX XE engines, duratecs, XFlows and zetecs. IIRC if you buy the first of the K series GSXR TB's they are not joined up so can be spaced out much easier, just adapt the fuel rail and bolt on to a twin webber or dellorto manifold and they are on. Then just use megasquirt (if your handy at soldering/mapping). have a look over on www.wscc.co.uk on the boardrooms do a search on technie talk for GSXR and it will pull up no end of discussions about this. There is also a guy on there called Bill Shurvington who is the man in the know when it comes to megasquirt so can be contacted...
Good luck with the project
Good luck with the project