G'day Things_Green
Sorry about the weather, is a bit different, but it is similar to the 60's-70's type of wet season
The motor on that Coventry Climax is possibly a Ford (English Ford 8/10 Anglia,Prefect 1936-1953) small side valve, often thermo-syphon cooling, they were used extensively as pump and generator units, usually trailer mounted, of WW11 vintage, but stayed in service until the 70's or 80's in Aust. there is apic of a larger unit Sidevalve Ford V8 gennie in Vietnam that I have seen.
cheers