Conversation Between pwdrhound and dfasadler

Hi I've seen some of your very helpful information regarding Pccbs and was hoping you can you advise.
I have a 2008 GT3 gen 1 and I want to change to a full set of Pccb's. I have a new rear set of 350 Pccbs 99735203101 & 99735203201
and have kicking around a set of rear 99135242530 & 99135242630 calipers would you know if the calipers will work or how would I find out?

And for the front, my question is because of the increase of the size of the 380 mm disk there's a spacer needed between the caliper and upright is this a Porsche part or aftermarket only?
Or as I've not found the calipers or front Pccb's yet is there a different option Turbo brakes maybe?

cheers dfasadler