i'm in need of new rear spring, i have the cargo ones in there now but there blown or the shocks are blow compressing the shock either way there both getting replaced.. my question though would be i dont like the cargo ones, so i was thinking the moog 590 which rated 399lbs.in or the 5379 rated 121.5 lbs.in .. now the ones that i have the cargo are rated 122.5 lbs and i'm thinking those arent enough support, they were new in the year of 2000 so i should go for the heavy rated spring right? looking for a taller height also