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There should be absolutely no slack on the intake side at all. Sounds like it is mistimed, which is very easy to do, just as easy as getting the timing correct. This is due to the fact that at TDC the exhaust cam wants to rotate forwards. Another issue that may be impacting your timing can be a stretched timing chain. When installing a new set of cams I never reuse the old chain, and the lifespan is reduced when you use a highlift and duration cam as well(especially those crappy cams from JUNK2). Also you could be off on the crank sprocket by a half link very easily.

The cam holder install tool is nothing more than a 5mm metal rod, there is no need to buy the factory tool. (a 3/16" wood, plastic or metal rod or even a 3/16"/5mm drill bit will work perfectly.)
 

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They should be EXACTLY in-line with each other if the timing chain hasnt stretched alot.

any mismatch means the timing is not correct.

I have built many K20's and they have all matched up perfectly.
 
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