I understand Larry has been getting by with 1.5" for many years now. Have fun today, sobill at aol.com In a message dated 2/18/2011 5:08:43 P.M. Pacific Standard Time, gow2 at rc-tech.net writes: That has been posted before but I am not sure if 1.5" is adequate....I mean for lifting the car.....I mean .......Don't say it Larry in Cleveland!