Bore centers for small block ?

I know they are in the 4.46 area - are they supposed to be exactly 4.4600 or is that on the big side of things? Is there a tolerance?

I'm coming up with 4.4584 range with a reinshaw probe.

Thanks

4.460000000000000000000000 is it

tolerance is what you want,, usually blocks are +/-.010

thanks