or,..lol
if you have a good center (either vj11 or 14 ) and the coldside housing and wheel are good on the existing vj11, you can build a 11/14 hybrid... you want the small hotside with the big coldside..
the exhaust wheels are the same size..
but on the coldside you need to keep the corresponding wheel with the corresponding housing...
when i did mine (way back in the day) i didnt even take the turbo out, i used the vj 11 coldside wheel and housing, and just bolted them to my exhisting 14 center. while it was still bolted to the manifold. you can hold the hotside wheel with a socket while taking the 8mm nut off the end of the shaft to swap wheels...