Depending on how deep the owners pockets are, I'd focus the $$ on the head porting. You should be able to get 190-200 on motor with headwork, compression, cams, and exhaust. That'd do right at 200 on the Salt. I haven't ridden the mile tracks so I don't know how Salt or dirt speed translates to pavement.
Have you talked to Randall Parker? I think his GSXR 1000 holds a few records at Bonneville