Question about how big can you run on the rear...

of a '90 LX coupe... My buddy has a '90 LX coupe with a 4 link rear suspension, no quad shocks, solid lower, adjustable upper control arms... he is trying to figure out how big he can go... he's looking at a set of 17X10.5" /03 Cobra rims... if you guys could just let me know what the largest rim size you can run on the rear, and also the largest tire... that would be awesome.
 
What are you smikin' Willis? I have never heard of anyone running a four link and upper/lower control arm set up.
This is what a 4 link looks like:
550-40020.webp


Enlighten me if I am missing something.