About high off the ground (or at what angle) should one lift the front end to finish burping the cooling system (to move the air out of the high spots in the cylinder head)?

I use to have a steep drive and would simply drive the front of the car up onto my car ramps(116). I have access to a lift so i figure I would run the front end on and raise the lift. I'm sure there are some cautions that I haven't considered so I'm all ears.

Cheers,



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S, J.R. Brown
1986 280GE LWB Anthracite
1980 450SEL Champange
1981 Volvo 240DL UPS Brown