I was running a 0.7/0.86 housing on my CA18DET. With the larger exhaust wheel and 0.86 exhaust housing as well, it was a lag machine even in my 800kg datto.
http://www.turbobygarrett.com/...2.htm
I got a 0.64 housing fitted, and I'm much much happier with the turbo response. I need to get the turbo up in it's 16->25psi efficiency range. I'll be doing that after getting the cams fitted.
Your turbo isn't a bad selection, but the 0.86 housing is too large :-)
Hope my info helps. Can't help much with cams yet, as I'm going to try and start fitting my cams today.