F me us AK builders were spoilt! Our chassis came with brackets.
Does the chassis long arm run along the length of the car? If so think flat, 90 degree vertical (or angled 65 degree'ish) then flat again so you can support a bobbin which in turn will support the exhaust, someone will be along with pictures, not sure I have anything in the gallery that will show this in detail.
I can go photo mine tomorrow if you need it