There are two different radiator shrouds and of course 79 was a crossover year. If you are using the stock fan and shroud make sure you measure between the two bolts on the right side of the shroud, and then call Mark's shop to ensure the shroud you have will fit, I think the measurement you want is around 11.5 inches.
That being said I have an auto transmission car, the radiator fits great....however you will have to install a separate transmission cooler.
![Image](http://i1121.photobucket.com/albums/l504/ptoneill/79%20Fiat%20Spider/4D334502-B781-4BE8-8998-1181F5F82983_zpsc10vooue.jpg~original)