Low compression "build" and cruise rpm?
Id probably be happy with the stock cam, the whiplash was advertised as a wonder cam for the low comp motor with a choppy idle so sounded good to me. I don't know my mouth from my butthole when it comes to cam specs.
the stock cam was a compromise. remember that they were hemmed in by parameters such as: idle quality, fuel consumption, sound/smoothness, power delivery, etx.
upgrading to something
reasonable would be not only prudent but highly suggested.
in this type of build, that style of whiplash/thumpr cam could be of benefit because of their grind. emphasis on
could...
are you going to rebuild or just rattle bomb rebuild with a gasket kit and ship it?
depending on that answer, the plan of attack may change. personally though, i don't think you could go wrong with the CH4B, a reasonable cam & carb, headers and a 3.23 out back. it'll make enough torque to separate your skull from your spinal column and turn tires into goo, but have zero drama and probably return okay-ish mileage as well.
ETA: and a OE electronic ignition set up with a good curve. that is KEY