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Mate that's no tick! More like a heavy tapping at best!
If I were you I'd take it back to the people who rebuilt your engine & get them to investigate.
In the meantime, how about a video revving it up & down a little? (probably upto about 2000 RPM should be enough. Don't do it for long! Just in case).
If it taps roughly equally loudly when the engine is increasing & decreasing in speed, theirs a good chance it's a noisy tappet (follower).
If it knocks/taps much more loudly on revving up then going down, then.... well that's likely really not good!.....
Anyway, to be on the safe side, stop driving it if you haven't already.
I'm not even sure it would be a good idea to drive it to the garage, can they come to you to at least listen to it?
Btw, how come you haven't already asked them?
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