sorry, i can't help y'all out w/the cam nelson sized/styled rides cuz they ain't my/or any of my buds' steez.
just make sure whatever shop you go to doesn't just cut/bend/heat @#%$ up randomly, esp suspension parts like control arms, shock/strut housings, etc while trying to "make" the wheels fit your ride.
coupla acquaintances had some pretty bad experiences fitting 20's on their rides back in the day when 20's were like 24's+6's. one dude's front strut just shot thru the strut tower and punctured his hood cuz some hack shop just took a grinder to the strut cuz it wouldn't clear his wheels. the other dude had his front end drop on the 880 cuz both his control arms split like wishbones cuz that shop notched em to clear.
i know it's the look y'all dig and are after, but cars & even trucks ain't really made to have that big of a wheel/tire setup.
and i'm surprised as hell roberts is still in business. i have nothing bad to say about em, but they never seemed that busy. i ended up getting my first set of performance tires from em way back in the day tho cuz the "jdm" wheels my dude Danny (RIP) ordered thru his shop for my Integra came in a coupla months early and I didn't want to wait to have my tires shipped in cuz I just had to slap them babies on ASAP.
"The expectation we have for Air Jordans is for the MICHAEL JORDAN of basketball shoes.
Lately we've been getting the Derrick Coleman of basketball shoes: bloated, overhyped, overpaid, & underwhelming." --Truth spoken by NT's own "Iron Lung"
Seize every opportunity to educate yourself.....STOP. Look. Listen.