Chevrolet 1533X2 30-cwt trucks

[Charlie Down]

Thanks Colin for clearing that up.
From what you say the 1533X2's would most likely have had the inverted 'V' inlet as they were produced in 1941. Later production vehicles would have had the filter if they had been ordered (the LRDG wanted to order another 200 trucks in late 1942 but by then it was clear operations in North Africa were winding down, so no authourity was given), with the filter being the same part as the Transfer case air cleaner. Trucks could possibly have been upgraded with filter system, but LRDG documents don't mention any other factory upgrades being retrofitted and it seems unlikely for such a small order in faraway Egypt that it was thought about. Now someone will prove me wrong!
So the attached photo would be the most likely set up (with push/pull rod controls) for the LRDG 1533X2 as delivered.