Main thing with these ones is check the rear splitter bar is in place near the front axle (its riveted on) they are often snapped off and without it the frame flexes - first it cracks near the top of the catcher chute, then down near the rear left wheel.
In extreme cases the whole lhs rear axle pulls clean through the body through metal fatigue
If it has a 4 blade disc, remove and check for cracks around the centre bolt - they were recalled for this about 10yrs ago but plenty still out there.
