Starting drilling spot welds again. I just mocked the parts into place. I will blast and primer the inner structure and back side of the dash etc.
Also, if my car wasn't so rusty, I would have located the upper sub-frame support locations with bracing etc.. I could see that mine were rusty and pushed back, so I'll just locate them as they need to be to get the subframe level and square.
The firewall needs plenty of patching too....