Pellow Bros Escort was turboed, lots of HP. They told a great story of it getting loose on the dyno!
Query re effective aero. I built a full aero calculated wing for Dave Brays DX Corolla bodied Modified, and calculations for that, later checked in a wind tunnel gave approx. 480lbs downforce at 70mph which was checked as achievable with a borrowed transport dept radar gun at Waikaraka. What we did not understand at the time was that the sails on the sides were more important!