I used 1 1/2 X 1/4 bar stock on the sides and rear and needed 2 X 1/4
inch stock for the front. The sides are 1/8" and the bottom, front and
rear is bent up .080". After getting the flange frame welded I brought
it home to use the stock oil pan to drill the mounting holes and fit up
the rest of it.  It is 2 1/2 inches deep in the front and 4 inches deep
in the back and holds a little more than six quarts. The drain is on the
right rear side.  Karibian

One question!  When you enlarge the oil sump do you have to extend
the oil pickup tube to lower the strainer.

Thanks
Rino Lacombe

It would be nice but no if you always keep the oil level in
the pan several inches above the oil pick up tube.
You still get the heat storage benefit of the increased
amount of oil which delays the temperature rise on take
off and climb out.