I have used two of those blocks in passenger cars for 426 Max wedge engine builds, they are usually way better on the cylinder wall thickness than any passenger car block I have sonic tested. I used all the OEM timing cover, timing setdistributor, oil pump drive ,M.W. heads, rocker gear, oil pan and pick up and so on
I bored both of them to 4,250 so there was room for future engine builds, I could have bored one of them to 4.310 and still had over .200 cylinder wall thicknesses on both the major and minor thrust surfaces
If you want to know how thick the walls are on yours before boring it have it sonic tested by a good shop