I had an '81 and kept all the computer stuff (as archaic as it was back then). Changing the cam on that engine is standard small block Chevy stuff. You might want to try a blueprinted regrind of the L82 cam. Really wakes up the engine and is very streetable and stable and you won't have to mess with any top end work. This was also the famed 327/350 HP grind of the 60's. I think Crane Cams and others have blueprinted, and updated versions of this cam. Give them a call.