there is the swb, lwb, and jumbo. The jumbo is a high roof while the lwb can be semi-high or high and i think the swb can only go to semi but not 100%, as for the engine the y come in 85,90,100,115,125 or 135 brake on the year you are looking at only the 135 has the 6 speed gearbox aswell. I would go for a 115 or 125 in swb, in a semi high roof i need to tilt my head when standing up and im 5ft,8 for the kind of money you have try getting a lx model aswell for the extra`s and as for the miles they should fine with full ford service history