383 power upgrade help

What cam did it have on it? The Whiplash cam uses a 1.88 install height on the valve. Your Springs and retainers I'm sure are not that tall. So it would depend on which cam you wind up with what Springs and retainers you would need and valve stem seals would be needed also.
I believe it was to be comp cams nostalgia cam kit it was I think .509 lift