Putting 335/30/18s on rear need bumpstop spacer ?

This is on a 4th gen Camaro . Im putting on a 335/30/18 BFG tire
on the rears of my Camaro , moving up from a 305/35/18 tire .
I already have done the BFH mod and rolled the fender lips . The
wheels are 18x10.5" with 56mm backspacing . I am going to run a
1/4" spacer on the rears as well . My question is should I run a bump
stop spacer ? I havent had any issues with the 305/35 tire . Any
input on future issues will be great ! Thanks in advance !

A 335/30-18 requires a minimum wheel width of 11.5" to 12.0", depending on the tire manufacturer.

Well heres a taste of what they look like on a 10.5" wheel ;) Definately looks like
its safe to me lol . Seems like the people that run this setup are all over on LS1tech .

http://i2.photobucket.com/albums/y10/ZL1LT1/IMAG0037.jpg
http://i2.photobucket.com/albums/y10/ZL1LT1/IMG_0753.jpg