I used to restore MGA's. I couldn't tell you how many I owned, worked on or parted out. I picked up one that had been stripped of a lot of mechanical parts but had some body panels that could be salvaged. When a friend and I loaded it on to a trailer we couldn't believe how heavy it was, especially with all the missing mechanical bits.
When we got it back to the shop we realized that a previous owner filled the frame with concrete in many of the usual rust spots. MGA's have wood floorboards and the frame rusts from the interior out. Most of them can be repaired ... but not the ones with concrete in them!