When installing the endlinks, do I want to get them started then lower the car back onto the ground and tighten them up with the load of the car on them? Or how do I go about the install of them?
For most suspension parts you want to finish torquing the fastners with the weight of the car on the part. But I have installed endlinks with and without the weight of the car on the suspension and didn't notice a difference.
Yep. IMHO, having the LCA at its loaded ride height is what matters. Ramps allow that just fine.
I should have added before that I have tightened them like Steve did. I did find myself lookin under there once the car was on the ground and level to make sure I had not tightened the nuts too much or little.