No worries. In looking at the Rival tire specs, you could get away with the 275/35/18 that will give your more than an 1" additional section width without changing the overall height by very much (+0.1"). This will be better for grip, you will just have to consider how much bulge you are willing to accept since the 9" wheel is on the small size for that tire. Based on feedback from the
Rival release event, the tires offer outstanding grip and longevity. Pretty amazing. I'll try them out when they make a 19" tire.
I tried stretching a 275/35 BFG on a 10.5" wheel and I didn't like the result. The tire rolled away from the wheel face too much and exposed the wheel face in an unsightly way.
I am running Hotchkis 2" SBC springs rated at 512 lb/in. The car is not diving that much in the speed stop pic, here is a picture of it
parked. The car is just really low
