I had a brain wave a few weeks ago and decided I should be making my bracket out of 2 pieces after all. I was so fixated on making it strong enough by using 1 piece that I didn't see the obvious way of doing it. So we now have 2 cardboard templates :


That are used to make the 2 parts of the bracket :


The benefit of doing it this way is the only bends are for the 'flanges' and because they are narrow they are easily bent and beaten into submission - oops I mean shape.
So they now join up thus :

And fit perfectly into place :

You can see here how this simple flat piece (well slightly bent really) goes across where the chassis used to be welded to the firewall, all the way across the chassis and then joins the other bracket to tie it all together. Pretty sure this will be as strong, if not stronger, than the original position of the chassis


Next job is to tack the WRX floor, the chassis and my new brackets in place and then get a professional to weld it up fully. Then I can just bolt all the WRX suspension and steering and the gearbox straight in. Then I need to finish off mounting the rear suspension, bolt the rotary to the box and job done - NOT !!