lifter pre-load?

The Mopar FTH cam 268/272 is
PN 4452761 with specs of 268/272/110 , lifts of .450/.455 and .050s of 228/231; springs are P4120249
This cam is usually installed at +4 degrees or in at 106 but you have a couple of degrees wiggle room either way depending on your cylinder pressure and/or useage.
If the block is perfectly square decked, and if the heads are perfectly machined,and if the valve stems are all at the same height, and if the rocker arms were identical in their pad heights and ratios,and if the pushrods were all the same length and straight,
THEN, the ONLY thing that could altar the preloads would be the lobe base circles. That's a lotta ifs.

You know that there are left and right rockers ,right?
And that 340 rockers are beefier than all others,right?