No OAP - I meant not going as far back on downwind ( but stay wide enough that you are not cramped).
I have no idea with the performance of a Mustang but my 'eyecrometer' says I'd have been planning on base less than 100 yards beyond the motorway - planning to touch down midfield .
If you are not cramped downwind It also gives you many more options as you turn base/final
If you can't stop (normally) by the end fence you are at least going much slower and can ground loop or pull up the wheels (good idea on a Mustang?)?
Even taking the end fence at slow speed is much better than taking the front fence at 150!
I saw somebody in a similar position make a similar approach (disappearing down on a long downwind) then literally brushed foliage with his gear as he struggled to get back! He then stopped in about 1/3 the runway!
This is essentially my point of people 'flying type'
Made me think of what I would do anyway!