Hi JJW,
If they are non-adjustable, then you may have a more serious problem. The negative camber should not be so extreme on a non-adjustable car.
Has the front of the car been mis-treated: accident, mild accident, hit a kerb? Is everything securely fixed: camber plates, kingpin bottom stays, anti-tramp bars?
Does everything look straight: cross-frame top tube and bottom tube?
Check that one or both of the cross-frame tension bars are not broken or loose as these bars prevent the cross-frame from bending.
The easy way to visually check is to remove the front wheels and shine a torch through the tube to see if a bend is visible; if it is bent, it will be obvious. The top tubes are clear; unfortunately the bottom tubes are obscured by the kingpins so a cursory check is only possible.
If the tubes are bent slightly, they are easily straightened without heat. Simply use a long bar inserted into the cross-frame and carefully ease the bend straight. Remember that a Morgan was designed in the blacksmith era!
Finally JJW, I do not intend alarming you but wish to make you aware of as many of the possible causes. One last thought, make sure that you have measured your camber correctly as if you have made an error, this would be the best solution and make all my suggestions invalid and also not cost you a penny!
