for the cooling system i found this thing on jcwhitney its basically a secondary radiator. http://www.jcwhitney.com/auxiliary-4.../p2000878.jcwx thers the link but it seems like it migh help a bit gives you a better compasity on your radiator so the coolant stays there longer and cools more. i dunno i havent had he oprotunity to try it yet but was considering it because i have heard of the cooling problems.

 

I've actually got a 91 RS as my daily driver. It's a 305 and I average 20-22 mpg in the city. It's fun to drive and it has enough power to cook the tires every now and then. I would recommend upgrading the cooling system though. It heats up like crazy in the stop 'n go. I would use the D gear in anywhere from 0-45 and OD for anything faster than that. (700r4)