advice on turbo fault finding

G'day

My old 4runner has developed a noise under load, a rattle noise when I put the boot into it, when driven calmly and very gently with no load there is no rattle.

when the old girl is stationary, I can get the rattle but only by revving much higher than I normally would.

Checked all the usual (Loose items etc) and finally checked the turbo, the vanes have some movement in them, If i had to guess about 1 - 2 mm, can definitely move it by finger.

I am thinking that as the noise is only under load and movement in the vanes that the turbo is on the way out, is there a way I can pinpoint this for sure (Isolate the turbo) it is a safari on a 2.8 slowlux motor.

Pretty certain it is the turbo and that a rebuild is coming but would appreciate some thoughts.

Thanks