Custom Console

[IronAnRkst]

So, here is my problem..

I am wanting to build a custom console in my 83 Scottsdale with a bench seat. I have my design figured up but my issue is other than making a resin mold of the floor hump does anyone have any other ideas as to getting the angles right..?

Where my hump is it has a lip along the bottom and back which I plan to sit the console down on then fiberglass coat but trying to come up with a better way to get the shape to follow the humps lip and go all the way around the curve of the bottom of the dash.. Any help is appreciated. Thanks.