Here is a few more bits I've done in the past year that I have photos of:
Spot welded every seam in the car
Collector I made for the manifold & the manifold:
Dump, dump&manifold:
Exhaust:
IC piping:
Prepped and tacked:
Welded and polished:
Some welding I did for a customer, was on a GQ patrol for the exhaust
And a bit I did on my current exhaust
In every picture above except the patrol exhaust I used second hand material.. so it goes to show prep and fitment is everything.. and so are other things of course but its pretty important you spend the time cutting and making things fit before you weld.