I think the 88-98 frames are a bit wider. But in addition to that, the whole front section is a boxed construction (not open C-channel). So I don't think 73-87 plow mounts are going to come any where near close to bolting on to an 88-98 frame.
Here is a good pic of an 88-98 frame from this thread -->
http://www.chevytalk.org/fusionbb/sh...hp?tid/254076/
