What I think is if your still running TBI it's not going to like that cam.
That cam to run correctly in a TBI will require new injectors, adjustable fuel pressure regulator, a remapped computer chip which will be a guessing game without it being done on a dyno which is expensive. I recommend you use the summit 1101 cam if TBI is still in use. All you need for springs are the classic "Z28" springs which many companies make and they're dirt cheap.
When you swap the cam install a new timing chain with it. However when you change the cam you will have to check valve train geometry. If it's not on the money the valve guides will be shot in less than 15,000 miles.
However there is one more thing worth mentioning even with that cam it will still want new injectors. If I was dealing with a engine with that many miles on it I would go on and rebuild it because it's already running on barrowed time.