340 camshaft break-in. Well.....almost

Not a good, complete video, but this is me breaking in my 318 cam. 20 minutes of going between 2000 rpms and taking it up to 2800 rpms. Make sure not to overheat it, and have it on number one firing to start it - known good working carb full of gas. Nice to have a buddy/wife, kid or somebody else there as well.

Thank you!! Bet the fingers get tired doing that for 20 mins Haha. How long after the start do you have to hit 2000-2800 rpm? Do have have time to check the timing and make adjustments? Or is it as soon as it hits put the the throttle down and hit 2000?
Also something I dont understand and iv asked before and still didnt understand but didnt want to ask again is iv read you need to check the lifters for rotation which I understand why but how is that done while it's running at 2000 rpm? I can't see the lifters without the intake off?