I've got the motor most of the way apart. Interesting fact about the oil pan is it's a double wall casting with dual sumps, same as on the S-54. If it were a lesser pump, all the internal parts would be avalible seperatly. But since it's a motorsports unit it's only avalible as a single $600 part.
https://improvedtouring.com...&pictureid=177
I suspect that the oil relief has been causing low oil pressure issues. Here are more pictures of the damage:
https://improvedtouring.com...&pictureid=178 The crack in the front sump area, note the built in windage tray and dual wall casting.
https://improvedtouring.com...&pictureid=180Close up of the rear sump, notice the pieces.
https://improvedtouring.com...&pictureid=181Note the rip in the back of the sump.
To fix it I'm thinking of bending up some 3/16" aluminum plate and building a new bottom end for the sump. Maybe even mill in some fins into the plate.
James