i am trying to position 2 end brackets sticking out 1.00 from enf of weldment and also position 2 round hinge items 1.5 inches from ends and centered on top plate??
You've uploaded the assembly file but you also need to upload the part files to go with it. Try pack-and-go to create a zip file and upload that.
It sounds like you need distance mates. You can also use these with that planes that are within parts.
I havent had a chance to download, but I think what you might be looking for is the "parallel" mate relation. It allows you to specify how far apart two part faces or edges can be.