It’ll probably be too short, when bottomed out the rear wheel may well hit the frame causing a scuffed patch, or even worse the swingarm hit the frame trashing it completely the first time you go over a bump.
Even if it doesn’t it’ll probably feel crap as all those carefully designed linkages you’re paying a fortune for will be working in the wrong parts of the travel making it no better than a BSO from tesco designed on a fag packet.
VPP’s are picky with their shocks, even buying a s/h shock the right length will probably leave you with a poor performing bike, and a s/h shock tuned by TF/MOJO/LOCO is almost as much £££ as just buying a new one. Non-kashima, custom built shocks are £285, which compared to how crap it will likely be, is a bargain.