Let me add a little something here. First I don't like conventional sleeves and wouldn't buy a block with them but, one on each side might not be to bad for reliability. Still would buy one.
In my opinion, the worst thing, about multiple sleeves, is that they add radial stress to the block, because of their press fit (.002-.003 recommend by the mfg). So, multiple sleeves are trying to push the block a part, at each hole, along with the increased sleeve bore, weakening the block.
Now, since your block is already bored for sleeves, the holes will be 4.297. 4.3125, 4.360 or 4.375, with sleeves .003 larger. Those are std Melling sleeve sizes.
If your up for the extra work, you can relieve that press fit stress, by going to flanged sleeves, they come in the same diameters and you can install them with .000 - .0005 press fit. Lock tight them in.
The flange is 1/8" thick and can be cut so that they are up to .002 high, for better head gasket seal or, if the machinist has a problem holding depth, they could be left as much as ~.005 high and deck the block, after so, they are finished 0 to .002 high.
After installation, I would reduce the bore to 4.13 - 4.16.
Done like that, the block would have a much better chance of living, long term, I think.
Edit:
BTW, these flanged sleeves are stronger than regular sleeves.
Melling “HP” sleeves are made from centrifugally cast, high strength gray iron. It is a lower carbon iron
alloyed with chromium, copper and nickel to produce a harder (241-293 BHN) more wear resistant
surface. The average tensile strength (45,000 - 50,000 p.s.i) is 1/3 greater than “regular” iron sleeves
and nearly all OEM cylinder blocks.
