Although I love lowriders and the work that most people put into them and how clean some look once they're really done, I think it'll be a waste for you to invest into something like that. Especially a Cadillac! This is one of the reasons why you see older cars like Regals and what not done in the lowrider fashion and scene, because those older cars/parts are easier to come by once something breaks, and trust me, THINGS WILL BREAK! Mainly suspension components (if they're still intact)...
Now, if this was for shows and stuff like that (non-DD), then sure, it'll be a cool little project to pick up... Otherwise, like I said above, not worth the headache.