273 commando Build

that engine had all the oem parts in it , cam pistons lifters steele shim gaskets and appeared to have never been opened up until I rebuilt it. mopar did a lot of stupid things on the assembly line as we all know .
this 273 commando engine block I'm going to use to build this time around is the same.... all the oem internals were still intact when I disassembled it.
as longs as were are talking about the tops of cyl block machining ..I would suspect that those milling grooves could be a issue too because I can catch my finger nails in the grooves.. that is not a perfectly flat surface ..I can see that as a sealing problem. right ?