Those parts should work fine. If he's removing the engine, just ask him to be careful of all the PS stuff and leave it in, write down or take pictures of where everything goes and carefully unbolt everything and you should be able to to swap everything over pretty simply. I remember when I was stripping my rack down there was hardline part and a sensor attached that I just threw away, but I'm not sure where that sensor would go. Might have just been a GS-R thing but I doubt it? I still say dump the PS and just use the new rack, make yourself one of these (I gotta get my web host fixed).