Am I ok with this? KB107 in La block

I'd also double check bearing clearances, most to rule out an issue there.
Dial indicator is the way to go for checking these types of numbers too. Like others have said, feeler gauge can be tough to get a good check with.
Also be sure to try and 'rock' the pistons a bit, or at least tap them lightly with a soft-faced hammer to make sure they're all rocked 'the same', since piston-to-bore clearance can let things move around a bit.