Sean.
I have a website
www.zx7rbuild.com but i haven't updated the fact that i am now fitting a ZX10R motor in it. I built a 950cc highly strung fuel injected B4 motor for it with a modified Yamaha R1 throttle body set...it ran a treat but i decided reliability was desirable as well as grunt.
I was told by so many people that it wasnt possible, they had tried and no way will it fit...being a automotive design engineer thats red rag to a bull
. With a few modifications it does fit in a P chassis, i am currently machining a set of brackets to fit the rear mounts in the correct position and adding other bracing and mounts where needed. Im waiting for my down pipe to arrive this week so i can finalise the engine location 100% but i have kept the rotating mass as close to the original 7 engine as possible (about 10mm further back so far) so i may have to drop the forks a few mm or add a little more weight further forward so im thinking of mounting a lot of auxiliary stuff up front.
Ill keep you informed as soon as i update the site