I bought these a while back and they have never been "perfect". They look good but they could be better.
what offsets shoould I do
The wheels are 19 8.5 35 et front and 19 9.5 45 et rear.

Please no flames. What's done is done.

 

Not certain about the question. Offset is fixed. It cannot be changed.

 

what size spacers would I need? 5 front 10 rear

 

More like 15mm front, 20mm rear.

 

Read here twice and measure:
https://my350z.com/forum/wheels-and-...er-thread.html

/thread.

-J