Areas that rust - Rear chassis

Rear chassis capping plate (bottom filler plate of box section)

The capping plates on the main rear cantilevered chassis sections are on the bottom, the formed sections being quite heavy top-hats with a thinner filelr spotted across the flanges underneath.

If water continually gets into these sections, the capping plate will eventually rust, the water can also get trapped betweeb the flanges and the spot-welds.

One way that water can get in there can be seen here Snorkel box, through the o/s snorkel box (on 2.1 Syncros, anyway) behind the o/s tail-light. (Drilling a 1/4" bang in the middle of the snorkel box floor, where the pressed fingers cross, can alleviate most of the problem I imagine. Deburr & swage it downwards a bit; helps stop water penetrating from below as well as draining properly.