It depends upon the year of the car. If it is an S2 spider without AC then it is not too bad. The heater assembly hangs from the underside of the dash. It is held by 4 small nuts - 7mm, I think. You have to disconnect the hoses and control cables and wires first and I recommend also removing the temperature control valve. The unit can be wiggled out on the passenger side.
Ed Prytherch
79 Spider
2 x 88 Verde's
Ed Prytherch
79 Spider
2 x 88 Verde's