Currently running on my 1999 996 C2 NB, 18X8 fronts with a 50mm offset and 18X10 in the back with a 65mm off set with no spacers

Looking at buying a set of SSR wheels that are 18X8.5 fronts with a 47mm offset and 18X10 rears with a 62mm offset.

First off will these SSR wheels fit a NB and how would they look? Will I need spacers to bring them out flush with the fender? What mm spacers would be recommended for both the front and the rear.

I've read quite a few posts about offsets, but got confused after reading so many.

Thanks,