Andrew, with all that good stuff, I'd have a hard time deciding what to change and what to leave. The B302 is very cool. You could probably sell it to someone doing concours for a mint. Or, if it were me, I'd have a hard time ignoring the urge to resto it right as it is equipped. As a period correct hot rod. If you are going more street oriented, changing it all out and selling stuff to finance the new stuff would be a good way to go I would think. B302's have a hard time on the street (IMO), they need revs due to the intake and exhaust ports being so mammoth for 302 cubes. A bone stock B302 might do alright, but even then I think they generally had very high axle ratio to work with it.
Regards,
Bob