Lifter height 1 mm decision

[Fred no]

Hi, i was going to change a few lifters on my mc engine and swap them for a 
few good ones from 4000 2.2 l head anyways i removed cam etc but when i 
compared the two lifters the seemed a little different so i pulled out my 
micrometer to check the height it seems that the mc engine's sits 1 mm 
higher then i checked for new ones but for both engines it's the same part 
number.
Now i'm placed with decision either buy 10 lifters or keep them all like 
so.Will 1mm have a impact on compression   performance  ect?? I'm not a 
engine guru... i tought of adjustment shims but found out that's just for 
solid lifters...

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