Re: 1969 Z28 30-30 Camshaft?
Hey Eddie, welcome - and great choice of car! What part of W London are you in? I used to live in Hammersmith/Shepherd's Bush area, loved it! Now back to your question:
Short of pulling the cam, you'd need to be familiar with using dial gauges and a degree wheel to detemine approximate cam specs (lift, duration etc); Measuring lift with solid lifters will be more accurate than hydraulic lifters, but if cam lobes, pushrods etc are worn and unevenly so, you won't get accurate readings - but should be close enough to determine if you are in the right ballpark. Bear in mind also that even if the engine still has a Z/28 cam, it could be the 140 off-road version, so be prepared to check your findings against factory specs of this too.
1969 04A Van Nuys-built Z/28. Cortez Silver with dark blue interior and VE3. Raced in E/MP at Lions in LA. Now restoring!