I'm going to say yes. The 3100 and 3600 are virtually the same from the cab on forward. They have the same springs and spring mounts. The difference is when you get to the front axle. The 3600 has larger spindles and king pins. Also, the 3600 will have larger brake lines. So a front end kit for a 1/2 ton and 3/4 should be the same.
