This is a AA truck. It could have single or dual rear wheels. It’s load capacity would be greater with dual wheels. Four blade fans were after market items that put additional stress on the water pump. If the cooling system is in good condition the original style fan should work well.
Dual wheels were not offered on the AA until sometime in 1929. 1928 had single wire spoke wheels. Single wheel 1929 trucks used the flat(ish) wheel as are on this truck. None of my AA trucks had a 4 blade fan.
@@tbah9402 My Brother In Law had a '31 long wheelbase dual wheel AA. It was the late one with the metal roof and dented firewall. He sold it at the family farm sale about 3 years ago. Last year I sold our '28 and '29 AA trucks. You are correct about plenty of opportunity for modifications in all these years
