1 looks a British D60 ( rims ), 2 looks a civilian delivery truck conversion, 3 might be a light truck " woody " , 4 is very interesting, might be a bus conversion but those are mostly on 3 ton chassis. 5 got big rims so might be 3 ton REA truck ( look-a-like).
What I am looking for is the n° 4 on a long chassis with the 5 stud rims 7.50 x 20.
Possibily build by Boyertown coach builder on a Dodge civilan chassis just before war production started in the Boyertown plant. Boyertown got a delivery body fitted for the 160 " chassis, body called S8 or SN8 . Body existed allso for the smaller 1 ton ( S 7 and SN7 ) . that body was later on used for the Dodge S7Ma 51 and S8Ma51 ambulances. For sure that body existed in 1941 -1942 for milk trucks and delivery purpose.
I asked Boyertown for more information and I am waiting for the result.
some pictures
bernard