I also suggest vintage trucks, leaning toward single axle trucks as used on farms, as well as many businesses at the time, i.e., lumber yards, creameries, ice/coal delivery, dray lines etc.,
While I’m in no position to aid financially in production startup, I have many books, photos & pieces of sales literature to help select & design prototypes for authenticity. some that we don’t have that would be nice: late teens early 20’s. Twin City (made in Minneapolis, became Minneapois-Moline Tractor in 1929) They built several truck models in late 10’s & early 20’s, including a bus chassis. http://www.hankstruckpictures.com/pix/trucks/jim_steele/1929_twin_city_sedwick_kansas.jpg http://gasengine.farmcollector.com/Gas-Engines/The-Twin-City-Truck.aspx early IH trucks of the 20’s, this was the type of truck that was our families first farm truck. http://www.autogallery.org.ru/k/i/28inttruckdumpbed_KI.jpg http://media.cmgdigital.com/shared/lt/lt_cache/thumbnail/960/img/photos/2012/05/07/e7/b3/sns091010truckdonat_768759a.jpg GM trucks of the 1930’s http://www.shannons.com.au/library/images/auctions/DFEFDYI6C42FU75W_medium.jpg – this is an Aussie version, but we NEED this cab for GMC & Chevy pickups, it was VERY common. IH trucks of the 1930’s & 1940’s http://www.autabuy.com/photos/467464_238692361.jpg http://farm4.static.flickr.com/3527/5715502909_c526610f0d.jpg There is also a need for a 1960’s IH truck like this http://images1.wikia.nocookie.net/__cb20100601071251/tractors/images/0/01/International_1968_Loadstar_1700_diesel.jpg this is just a teaser list of some good potential 1/64th trucks, all would adapt to layouts for Farm trucks, industry trucks, etc. Martin
