Tom Kirkham IMO the March pulleys are not good for the FE motors. They have the wrong ratios for the crank to water pump. I used them and had about 20 overheating problem with this setup. I also tryed 2 different water pumps and ended up with the EDELBROCK one after removing the inspection cover and matching this up to an AC, FE motor car. I even swapped my ERA radiator from copper to aluminium Griffin one. The pulley ratio was the main overheating problem.
The guys that are running your pulleys have not had the overheating problems others have had from either street driving or racing. Do you have a picture and the sizes of you pulleys for here. They are custom and really nice to look at.
Rick L.