How do you measure if your front end is straight

don't you measure across from bolt to bolt?

 

What exactly are you checking? to see if subframe is straight??

 

Yes

 

have you been in an accident recently.
doing an alignment would give you a good idea if the subframe is bent

 

Not sure... usu. svc. manual tells you where to measure.

 

What I've always done, to line things up, is find the center line of the drive train (engine, tranny, diff) and then measure out from there. It all SHOULD be symmetrical

 

What He said. ^^^