Got the left side vents out but can't see the resistors for the blower.
What should I be looking for?

Well finally got the resistor, bit messy to get at.
remove glove box lid, take out as many of the screws attaching the plastic dash fascia etc as possible as the resistor is on top of the blower casing, remove vents, have to manouver the ducting around to get screwdriver in to the 2 screws holding the resistor in.
you can get the fascia to pull out a bit but the steering wheel column has to be removed to get the last screw out the fsacia bit goes right across the dash from the vent to the steering column, so its a bit of a pain just bend it out just be careful not to break the plastic.
Having done that i find the large resisitor has been cooked and so the others don't work except on full, so need a new one. or solder in replacements if I can work out the values.
the part number ont he restor board is 09-24809 5173, its a board about 6mm thick, 50mmx80mm roughly, with 4 prongs for the plug sticking out one side in an L pattern and the resistor sections on the other side. it looks nothing like earlier or later ones. if someone has one of these in good nick i would be pleased to hear about it.