I have just scaled the vents as best I could from the photos I have. The vents are quite large so I am guessing the Aussie one's were the early type HP bodies so I am going to cut the holes and make the vents for my model plus add the extra aerials to the roof shown in the ex Bob D truck photo.
Thanks everyone for their help
__________________
Cheers
Cliff Hutchings
aka MrRoo S.I.R.
"and on the 8th day he made trucks so that man, made on the 7th day, had shelter when woman threw him out for the night"
MrRoo says "TRUCKS ROOLE"