Like the others have said, I use 2 short pieces of 2x4's and set each one in front of car ramps. Drive up and gives me enough clearance without scraping. Just did this tonight to pull out the O2 sensor after the cat on passenger side due to a code. Pulled O2 and wire brushed gunk off and good as new. No more code.
1998 Mustang Gt, MSD coils, Ford Racing lowering springs, KYB shocks, caster camber plates, Flow Tech exhaust, K&N CAI, auto trans with shift kit, Jet Performance module, full length sub frame connectors, Redline Tuning hood struts. Oh yea, forgot to mention the Plasti Dip stripes.