340 wall thickness & deck height

Let me recap
just because you can does not mean that you should
let's clear something out
did you mean to bore to 4.080 or .040 over
or as you said bore .080 which is to 4.120 BVVC
your ring seal is better with a thicker wall- as has been said above
you can loose power with larger overbores- so bore to 4.060 which is .020 0ver-
a common size for pistons and rings
find a shop with the tooling to square deck the block off the crank and cam centerlines
.010 is too much if you are going to dial in your quench
do get your rod lengths and piston CH in hand before decking
what heads are you going to run?
glad you checked your block