Isn't the 84 a smaller spring?
I'm interested in a heavier spring for my 83 480. Will it definitely fit that?
I can measure then up to make certain Brad , I wouldn't want to be wrong but I have 82/83/84 /85/86 shocks here the 82/83/84 are all 40 mm bore and a small ID spring .85 on had 44mm bore and a bigger ID spring the and later again came 46mm and 50mm for moderns.
the 7.3 is probably too big a step for your weight Brad .
okay measured 265-270mm long and 56mm ID
I also have a FOX twin clicker with a 6.2 kg spring for 83's. Its missing the bump stop and the spring retainer(easy make ,aluminium copy, Capps has the Dimensions)probably needs seals but chrome is good.