You'll have seen this one before. Barry says:

One of the photo sequences that I send on every job. The front pan is an impact bumper style one, so the top ends at the front are different. I blank these ends with new metal, and later n once the slam panel is finally positioned, scoop out the semi-circular cut-outs that should be in these areas.

Whilst here, the half-moon drain is beaten flat and welded up. Later on I'll use a jig to drill the correct pre-impact front pan drain holes.