As a member of the NO-TOW-BAGO Rialta club there is lots of information about towing with the Rialta. What transmission cooler did you install? To save the life of the transmission most members have installed the http://www.makcotransmissionpa.....21-1K.html
with the bypass. There are several Rialta groups, Yahoo Rialta-Tech and Rialta Big Tent group, that have Tech info about different problems and repairs.
Graphics = what ever you want.
Wheels, 16" diameter only with load range "D" for weight. At least 104(front)/109(rear) rating for weight (2K#+). Most owners leave off the wheel hubcaps because of the flexing and loosing hupcaps. Check the rear axel around the back of the brake hub for possible cracks to prevent wheel from falling off.
Most of these items will be found in the file sections of both groups. Your hitch is only rated for 200# tongue weight and 2K# total weight. Most owners purchase a scan-gagueII to monitor engine and transmission temperatures.