Hi Grumpy. I had a look through the old posts and photos of other HD8s. A couple of things I have noticed, the bonnet on mine has the same cut out for a fuel tank on the opposite side to that of the B&S engine which would point to a Honda or Fuji but of course all of the mowers could have been made with the same shaped bonnet irrespective of engine used! the rear deck and mudguards on my mower are a bit different to the other ones I've seen on here, the wheels on mine appear to be larger than the others I've seen, mine are 6" front and 8" rear with 13x500x6 and 16x6.50x8 tyres fitted. Again these may be non standard tyres?
Ron