I've owned a '59 , two '60's , a '67 , a '74 , and currently an '82 El Camino . None of them had any major mods to their suspension , only new springs and shocks . The heaviest load I ever carried was a side by side refrigerator in one of the 60's and a load of concrete blocks in the '74 . I completed the haul both times and swore I'd never do it again !
El Caminos really are cars and not 1/2 ton pickups !