1984 Pro Star Resto..(maybe)

[Bouyhead]

So I picked up this 84 PS 190 over the weekend. It was advertized as a 82 but was an 84'
I had a ton of questions about this vintage but I read the history thread posted by C36 and all the resto threads posted hear and got most thing covered. I thought MC went to all composite in 85' but according to C36 it was 83' Not sure how far I want to go with this project just yet. Seems to be a good candidate for a resto, how deep I go is to be determined. I do have a few questions, some pics attached:
1. Is there a way to check to see if the foam under the floor is soaked?
2. Is the floor fiberglass all the way up to the bow?
3. Is this the original location for the fuse block?
4. Are these the original decals?

Any input or comments are welcome, Thanks!