And, let us not forget, as long as RR RB.211 engines have been mentioned, that there is also a bump thrust available for the TriStar, both the -22B and -524B402 models.
The basic -524B02 used at SV, was interesting in that it was a derated engine already, so altho a bump thrust rating would have been useful on some occasions, one was not published...you had to write to Rolls Royce for the data.
I mentioned this to the L10 fleet manager one day and his reply was...'shhhhh, say nothing, please, we have enough problems with some of our pilots as it is.'