That looks like one of the resistors for controlling the fan speed (1.5ohm). Does the fan only work on one of the three positions at the moment? Can't remember what wattage they were, but you can work it out as you (12V supply / 30A fuse - I think). Unfortunately, if this is burnt, there's probably a short in one of the windings of the blower motor. Also, there was an updated, much more reliable fan released later, so if the car is stripped down for restoration anyway, he should consider looking for the newer as a replacement.
McBryce.