cut shifter hole.... problem solved
come to think of it i did the w58 conversion in my car a while ago behine my old 20v, i didnt even need to cut the hole... the shifter was really close to the back left of the hole but didnt hit, you should be fine but...
w series boxes come with 4 different shifter positions
front/middle/rear/ hanging over the rear
mine was the one just at the rear, unless you have the furthest back one you should be fineand even then u wont need to cut the hole much