How to measure for subframe squareness?

[Rileys68Camaro]

Dumb moment. I just remembered I never checked the subframe to see if it was installed square to the body.

Where are the best point points to check it?

I didn't install the subrame, so I never thought to check until now after I got my drivers door and fender about 95% aligned...argh...

Can you tell I've done this alot?

[Zee]

There should be alignment holes next to the bushings. If the holes line up, you are good. I wouldn't worry about it too much as they didn't back then and there is very little adjusting you can do.

I couldn't get my car to align and it turned out to be some major frame sag with some minor collision damage. I had it straightend by a local shop and installed offset shafts. Looks good now and matches all of the blueprint dimensions.