i put heavy duty rear rear springs on my 75 saloon. not too strange then when you consider that i have stuff in the boot plus spare wheel plus full tank petrol and 77 litres of LPG and a very heavy lpg metal fuel tank !! i bought mine from best of british rover spares. i think they were in that area. you could give them a call as they are on the bay and online shop .do a search .. nothing lost.