What's this cap off? Any ideas? It's about 9½" across.

Also, this sandwich plate - shown from the tranny side. Ford four-potter?

Found one more thing (but deleted the picture - doh!): A single pot Girling master cylinder with a very factory-looking plastic height extender. Disc brake HR? Think it's 1" bore.
Who's game to punt on any of the above?

Also, this sandwich plate - shown from the tranny side. Ford four-potter?

Found one more thing (but deleted the picture - doh!): A single pot Girling master cylinder with a very factory-looking plastic height extender. Disc brake HR? Think it's 1" bore.
Who's game to punt on any of the above?