Mopar R1 block

The gentleman that has the block told me he had it sonic checked, and if I’m understanding him correctly it would take a .100 overbore, from a standard 340 bore size of 4.04 though he claims it’s 3.91 now.
He’s had it for years, and is pretty happy with a stroker build he has with a standard 340 block. So he feels he has no need for it.
I would want to of course stud everything, and install 4 bolt main caps, bore it close to 4.100 and hope that leaves enough room for another overbore.
Probably some of you guys have run one of these blocks, and I’m concerned if there was some problems with them?
If there an improvement over the x block I wouldn’t know, as I did find one x block, though it’s quite a distance from me.
Thanks for the info on the thin area under the oil filter area, and the resources.