Made up a new front cross member as the old ones I had weren't any good, bent and cracked.
Everything seems to fit up OK.
The Valance needs a piece made to fill the huge hole put in it by a previous owner. I was thinking of putting the two large air slots in it like the early RS2600 has.
Doe's anyone know the hole width on the RS2600 front valance? looking at pictures of them it seems the outside edge is the same as the bumper bracket slot.