If you are going to change the whole heater box over make sure it is from a car with the same shape dash my98 on I think, because the boxes look the same but are not, there is a slight change in shape from the earlier ones where the boxes join each other, I discovered this when I put decided to upgrade my 95 WRX with 98 WRX heater & aircon while I had the dash off, the good thing is the actual cores are identical & you can swap them from box to box, I've got one from a MY97 low k jap import you can have for $40, looks like new. Tom 0422317000