Guy--
I have a similar disablitity (?). Mechanical drawings are 3D to me and I 'see' the part in all dimensions. Electrical drawings (and city maps) are just a stack of overlapping squares and rectangles and will make me puke if I stare at them too long.
If you read a string of numbers don't expect me to remember anything but the first digit UNLESS the number actually 'means' something. A measurement will be remembered forever, a phone number never.