Didn't Stan Keen hold the outright record in an Elfin MR5 for a while? So 5000 on the hill wasn't without precedent.
I believe so. Stan was a competitor there in 5000s a few times I believe , though before my time as well as his formula Holdens about 20 years ago. He used both his road race one as well as another with a large high front wing which was his hillclimb special.
He has ran there in very recent times in his Grandsons Evo 9. I believe he went well.