Have you gone through the car and checked to make sure evrything is tight? Often times, after items run through heat cycles the hardware needs to be tightened/adjusted. Get the engine up to normal operating temperature and then check exhaust manifold bolts; the noise, if it a loose bolt, should disappear after tightening if that is the cause for your ticking noise. Valvetrain noise and exhaust leaks can have a very similar sound. You said you have Comp Cams parts that are replacements of original style? Is this correct? If so, you shouldn't have an issue as originally, there really wasn't any further adjustment after installation. I doubt FJ would've harmed anything in the dyno room; he is a seasoned veteran and knows the ropes. Does the noise get louder or change when the engine is warm/hot? Kinda hard to do with a stick, but as others have asked, does it change under a load? If you have to, jam on the e-brake, put chocks on all four wheels, and let clutch slip a bit while in first gear and see if what you're hearing changes; do this only as a last resort, and if you aren't comfortable trying it, don't. Unplug PCV and see what happens; I've seen dimestore PCV valves make noise, but not loud enough to mimick an exhaust leak. Is your heat riser working properly?
Other members have given great advice/ideas to isolate noise.
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