I ran 18's in my truck, on a really hot day with a heatsoaked 22RE (sad ._. ) and I bogged really bad on two runs. (my only time i've ever launched anything on a drag strip). I'm sure i could run better, but i'm not expecting much.
I raced my truck once. the fastest i could get it to was a 18.5 on the 1/4 mile with my stock 300,000+ mile motor and some bald ass tires haha... i been trying to save up to rebuild a motor though...