Best to do it yourself with a home made jig or tape measure on the ground. Modern alignment machines use "heads" that mount to each wheel that see each other with lazers, the heads usually don't clear the front of a slammed bug to see across the nose to the other side, not to mention if your beam is narrowed there will be a offset problem front to back IF you can even drive your narrowed beam on a alignment rack without falling off/falling in between the ramps.
