My '99 was running too hot with the body kit front spoiler, city driving was no problem but at highway speed it was way too hot after maybe 10 miles or so. I extended the air dam , that fixed it .....
AHHHHH ... didn't think about that, just remember the RS's back when I bought my 97 camaro new having that kind of air dam and side skirts. Did you tune your LT1 or have it done?