I did that with two 14' long pressure treated 2x12's. Cut them into 5', 4', 3', 2' lengths, stacked them and nailed them together for a 6" lift. Just enough to get the truck or car high enough so I can lay on a piece of cardboard or scrap 1/4 plywood I get from work and not be cramped underneath. Works great! :thumbsup: I tried creepers, but I end up running over my jacket or hoodie. Cardboard is just slippery enough to let me slide very easily right under there. Also, any spills drop onto the cardboard and not my garage floor or driveway.
Speaking of spills, I noticed about a 4" puddle of oil on the driveway after working on the truck. So I put some kitty litter on it to soak it up. Works great. Been using it for years. Came out the next day to sweep it up and there was a nice pile of cat poo covered up neatly in it! Stupid neighbor's cat.