Found this on ebay if anyone is after a new engine
http://www.ebay.co.uk/itm/Rootes-Minx-Commer-Hillman-Hunter-Humber-Scepter-Sunbeam-Alpine-Short-Engine-/271228128783?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item3f2674ce0f#ht_2332wt_1162
Forget that one the same person has it on at a different price
http://www.ebay.co.uk/itm/Rootes-Minx-Commer-Hillman-Hunter-Humber-Scepter-Sunbeam-Alpine-LC-Short-Engine-/281127409695?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item41747fd81f#ht_1366wt_1162
Ones high and ones low compression which is the price difference. Been to see them while I was working down there, on a crate covered in grease and wrapped in plastic...lovely. Think they build them up there. I think Martins fitted one with great results
I hadn't read the descriptions, just saw them and assumed they were the same, well my excuse is they look the same and it's raining so it's befuddling my brain, memo to self, must get out in the garden naked more.