So is it worth going through all of this on a car that already has all of the front sheet metal hung, if I'm satisfied with how the panels fit? What's the down-side to leaving as is, other than me knowing it's not right?
I'm just a little concerned about opening a can of worms by moving the sub-frame, and then having to start adjusting all of my front end panels and hoping I can get them to all line up again.
You don't have to change anything in order to measure it. See how close you are. The nos. in the spreadsheet are mine. Get a plumb bob and find out how well your frame is aligned. I used the plumb bob to bring the measuring points down to the floor. Then you simply measure with a tape measure between points as illustrated in the drawing. Fillout the nos. on the spreadsheet and you can see how close you are. I cannot attach the xls file so send me your email address if you want it.
I did the whole process myself. Note: You have to have car positioned over your garage floor such that the height of the car is positioned precisely at the documented measurement points. That's why I use the plumb bob to extend the measurement points to the floor. Otherwise, you would need two people to measure up in the air from one point to the other. Very difficult to make it accurate when measuring just by tape measure point to point.
