Ditto on RCC as one of the more knowledgible MII front suspension shops out there that knows Cobras very well also.
www.dwayne9.addr.com (RCC web site - finally)
The uppers typically need to be "D", not "A" for spring housing clearance.
I'm using 17" also (235's) and turning radius is not limited by the tire unless it's rubbing on a fenderwell. A coil over would let you adjust this. My steering limiter is when the brake caliper contacts the strut rod. Parking is the only time this is encountered.