Tumbler05

So right now I have a 1983 GS model FB with a stripped interior (Including the dash), and I was wondering whether a S3 dash from a GSL-SE would just plug right in. I think the mounts that go along the bottom of the windshield are different between the S2 and S3, but I am not completely sure about that. This is the first step in my project, and I just want to know if I have to go find a S2 dash somewhere or if I am able to utilize the S3 dash that I already have. Thanks in advance guys!