Thanks Dave.Britt does appear in the most famous scene but the footage of Jane Jackson (shot from the rear) was inserted without Britt's knowledge when it was decided that Britt's dancing simply wasn't raunchy enough.
As you imply this role was in effect played by four people.
Still think a film which depicts what happens when reason is suppressed & faith is used to justify anything has a greater topical resonance now than in 1973.
Thanks again.