Nelson
OK we see the problem. That is definitely not right, the dust cover should be flush on the upper cross frame mounting point. The most likely explanation is that the frame front (cross frame) has been distorted at some time in its long lifetime. Are there any signs of the tubes being stressed, a small crease anywhere , or the brazing having been retouched at any time ?
I agree with Dave Collis try taking lots of measurements from the end of the lower cross tube back to the chassis (preferably on both sides (but I understand you might be reluctant to take the right side apart if that fits well)
Try to get the chassis level and take measurements to the floor on both sides (providing the latter is itself level)
I notice you have an axle stand under the lower cross tube , believe it or not this can distort things slightly and it might be worth getting the weight off this (jacking in the middle of the cross frame lower tube. However I doubt if this would cause quite so much of a problem.
With a judicious amount of heat , and a few choice bars and tools you can "tweak" the bars and end pieces slightly , but this is not a job for the faint hearted, and it would help to do it with someone having skills in this area. Failing this get hold of the measurements of a "new" frame front and see whether there is a significant difference. Morgan Spares in New England should be able to help with this.
