This is the sort of case where you could use decent diagnostics. I have a 6 channel electronic audio detector (a multi channel electronic stethoscope.) each detector has a crocodile clip that can be clipped onto items that you suspect. - IMO it is not a shock - but it could be -who knows ? - it is so helpful to have the audio pick up as you can connect to eachstrut top for example - also to a track rod and suspension arm - any combination really.
http://www.ebay.co.uk/itm/Car-Elect...670018?hash=item3d26208342:g:6dgAAOxyiRlSa-oq
It seems expensive but is actually really really cheap when you compare the price of a few replacement parts that turn out to NOT be the issue.
It would be entirely logical to put the blame on the fitting 'lift kit' until proven differently.
As for your tyres. - after you have solved your problem - whatever they were like before you will still need to get the camber angles sorted at the front and then do the tracking - don't bother with tracking until you have the camber corrected.
Hopefully you get it sorted.
I still think it is the jack in the box lol