Surelly they have tools to fast and easely do the front end alignement without pre-assembling fenders, bonnet, fender extensions, front vallence, grill, etc. But, for crash repair or restoring purposes the easiest way is to have some measurements, like frame to base high, top shocks distance, low arms rh to lh distance, between sway bar holes and/or front frames on radiator support, and diagonals from cowl corners to shock tower, to lower arm bolt holes, to front apron to radiator support corners. Basically with these measurements and a couple more you know everything will be correct on their place and car geometry will be as it should.
If the ones that already have those measurements will not share with members I'll do it as soon as I'm getting the job done as will make things much easier for all of us.
The ones here are found on FB but I'm not sure about some figures
Thanks