If you can, change the axle and freehub to a 9-speed model from a late 90s Veloce or upwards hub.
You should be aware that there were 2 versions of the Veloce hub. The newer one with cartridge bearings and the discontinued one with loose bearings which is mechanically identical to the more expensive models of the day.
You can't fit 9 speed cassettes on 8 speed hubs as the splines are too shallow.
There may be some compatible cassettes available from other manufacturers that might work.
Completed: 94 Stumpjumper w. M733; ; 92 Dave Yates 731 ; 97 Parkpre Pro-Elite ; Pace RC200 F6 ; Pace RC300; 82 Gios Super Record ; 97-8 De Rosa Giro D´Italia; ; Banani SPX Track bike ; 89 Alan/Mavic Cross Bike ; 05 Focus Cross Team ; 90 Look MI-80 all-Mavic ; 12 Focus Izalco Team/custom build ; 11 Focus Thunder Custom build
Projects : , Brouwer all-Mavic
Stripped : Pace RC303
Gone : GT Karakoram
Stayed in the family: Kuota Kharma, 04 Stumpjumper FSR
Ceased to be : Dynatech MT3, killed by corroded seatstays.