Hi
I suggest looking for a garage that has a Hunter 4 wheel laser alignment system. Not had it done myself but apparently from reading on here you have to ask for a no load setting when they do it. If you don’t, they may do it on half load setting because the van looks like it’s got weight in it due to the lowering, if you see what I mean. Uneven tyre wear will be likely be a problem unless it’s sorted, and best to do it after new tyres are put on.
Loads of threads about this on the forum.
Good luck