My boat is a 1960 12' sea king V-bottom and I am trying to get some info on how to install flooring, Also this boat has a closed bow on it. I would like to remove it to open up some more room, but don't know if it is structural to the boat

I would suggest going over to the Iboats forum, registering and posting this question on their restoration forum.  Those guys are pretty knowledgable of older runabout's of that vintage.

I have a next door neighbor who did this to his really old boat. Now his is wide open from end to end and he has no problems, fished it for years like that. You might want to think about adding a bench across the front, or a small deck if you're worried about structural support. Would serve the same purpose as the existing front end does now in holding the sides in position like they are I would think. But think about it, a 12 foot boat is not super large so what would happen if you removed that cover?? I had a 14 foot boat once that was wide open and didn't need a cover like that. Deep V-hull too. 14 feet long and 5 foot beam width in the middle.

However I do admit I'm not an expert in this and don't know all the ways they made boats so I can't say for sure. Do a bit of research first I'd say.