Replace all the valves with new stainless valves. Might was well upgrade to 1.77 exhaust, that way you end up with fresh metal to cut the seats when you go oversize.
Don’t reuse the original factory 2-piece valves that have the heads friction welded to the stems, they do fail with devastating consequences.
Nobody can help you choose the correct cam without knowing anything about the car it’s going into as well as all the information about the drivetrain and gearing as well as rear tire size.
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1964 Tempest Coupe LS3/4L70E/3.42
1964 Le Mans Convertible 421 HO/TH350/2.56
2002 WS6 Convertible LS1/4L60E/3.23
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