Here's another frame dimensional diagram that I saved from somewhere - I've hardly looked at it, so can't comment on the accuracy of the shown dimensions.
Randy;
I checked a GOOD, known frame that is flat, and measures GOOD for "diamond".
Most all of the measurements fore and aft are not even close, the measurements left too right look close. So I don't consider this print good for checking a frame...
I'd like to find a Ford print,...anybody have one?