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mr fixit. not all ROTARY LIFT hoists have screw pads on the swing arms. some of their models have fixed rubber pads but have the option of several thickness rubber pads that 'snap' into place or 'pop up' at the end (90 degree snap up position) . also, some low slung cars have a frame or lift 'pick up points' that are lower than the swing arm height at full 'rest' position which necessitates driving the car onto some wood , or similar material, so that the car is raised enough that the swing arms will swing underneath (my 57 bird is too low in the front and requires the front tires of the car to be driven onto 1x6 piece of wood . similar experience with a viper). Other cars with side exit exhausts will find the rear swing arms to have a similar rear clearance problem requiring the rear to be driven onto a piece of wood to get clearance for the swing arm to move underneath, and some cars will also find that the swing arm 'squashes' the exhaust at that point ( as it does my 65 mustang with limited frame rail pick up points in the rear and side exit exhausts). my 4 post Stinger hoist encounters no such problems with low slung cars etc. Both my 2 post Rotary Lift hoist and 4 post Stinger lift can raise to the same 6' height so working underneath each is the same. Remember, many lifts have different options for swing arm pads, adjustments etc and are not all necessarily the same. Bill.
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