When they made the Thruxton, it was given an 18" front wheel to steepen the rake. You could try that, or slide the fork tubes up through the triple clamp a bit. Not too much or you could have clearence problems.
Steelheart- '03 Speedmaster Black/Yellow
The Hayabusa Killa
16" Shorties/140 mains/Airbox drilled
Procom CDI
"There is no cure for Celibacy. But we can treat the symptoms."