Pretty sure they were originally an American design, we just binned them for some of the obvious reasons. MGA's, by the way, have four tapped holes on each side of the front crossmember. Those holes are used to mount the lever action shocks, which are also the front upper control arms. It's not too uncommon to find that those threads strip or the bolts happen to loosen up over time.
Tony, I'll trade you 40 degrees F for 5/8 of the salt on our roads.