Hi Hanno,
Thanks for confirming that information.
I'm still on the hunt for evidence that they MAY have fitted some trucks with PTO compressors. As they were so keen to have them fitted to the Chevy 1533X2s, I'm thinking that they may have had previous experience of the pumps on other trucks. As it only takes a competent mechanic 30 minutes (allegedly!) to fit one there is every possibility that they trialled them on some Ford F30s. No evidence yet, but it makes sense.
The nice advantage of the LRDG F30s over the Chevy1533X2s is that one still exists in the desert in pretty good condition. I've managed to get 20 photos of that truck (L4406114) and they provide loads of interesting details for the projects. However I'm after any other photos on the basis too many are better than not enough!
I'll post the photos I have for discussion purposes, although I can't remember where I got them from, so apologies for that!