whats the best way to shorten 31 spline cv shaft
 

i have 31 spline shafts from a mountaineer and 8.8 31 spline. What is the best way to shorten them. what is the new distance on half shafts from 8.8 to hubs and who is cheapest to broach hubs. I want to use these shafts and will relocate shock to use them.