you’ve got the right idea. from a former turbo lover (i’m an N/A guy now) LS motors can handle boost really well (so can any honda motor, honestly) its just all in the tune. the main factor involved is always going to be money. if you have the money to do everything right, then you will be fine. now keep in mind that its more than just the build, you could “bulletproof” the whole motor/turbo setup, but without a good tune, you’ll have nasty detonation that’ll really rain on your parade.
using reputable aftermarket parts for your build is only going to help (when installed properly) if you have the money for them, forged rods and pistons will be able to handle a little more abuse than stock units. though the stock rods and pistons really aren’t that bad at all, which is why you see so many internally stock LS turbo’s out there making good power. the key, is the tune.
you pretty much have the right idea, as long as everything is done right, you won’t have any problems with your build. and if the tune is done right, it should be just as reliable, and last just as long as a stock LS without a turbo. you’re fuel economy won’t be as good, depending on how your car is tuned, but for the most part, unless you are getting rid of A/C and power steering, that’ll probably be your only sacrifice.
cams will help make power, obviously. crower’s 403-T’s are great turbo specific cams for LS motors. a little headwork will help, but isn’t terribly necessary. a mild port and polish will help the flow, but won’t make gobs of power. replacing the valves with stainless steel would be beneficial, as well as a 3 (or 5) angle valve job will help with flow. but again, its not necessary and you wont be hurting anything if you dont do it. dual valve springs are pretty much a necessity with the 403’s, i believe (but dont quote me on that one) but again, it couldn’t hurt. a little piece of mind is better than a big pile of shit in the end.
make sure to have the cylinders honed as well. boring wont be necessary as long as the cylinders aren’t scarred in anyway. just a good hone, without taking off any meat (so to speak) to clean/smooth out the walls for a good seal for the rings. having the crank balanced, cleaned etc will help take stress off of the rotating mass (the enemy of the internal combustion engine) essentially, like you stated, a full engine restoration with quality aftermarket parts for reinforcement is all you need for the ENGINE. the real money will be spent on the tune, the proper AF ratio is critical on a turbocharged engine, whether it came from the factory that way or not.
good luck, bro and keep us posted.