Jacking up car

[Butler]

Wheres the best place to jack the car without damaging the underside.....?

http://www.ebay.co.uk/itm/Trolley-Jack-adapter-10mm-slot-Jacking-Pad-Hard-Rubber-tool-classic-car-/272380166370?hash=item3f6b1f80e2:g:nAEAAOSwJkJWhPhI

http://www.ebay.co.uk/itm/Pinch-Weld-Deep-Trolley-Jack-Tool-Rubber-pad-block-jacking-sills-Classic-Car-/282180807223?hash=item41b3496a37:g:1oQAAOSwHnFVzxaP

thought about getting one of these...?

[Flyingscotsman]

Either use the strengthened welds (inside the front & rear sills) where the "spare wheel jack" fits  or use part of the suspension.

The rubbers look like a good idea - I use small bits of wood myself. The 10mm slot one would probably fit in the jacking points.