You are correct on the flywheel but not the clutch. Look up a flywheel for a 4.8 or a 6.0. Doesn't matter which one as they are exactly the same, most people go with a sachs nfw1050 flywheel. Make sure to get some new GM flywheel bolts too. As far as the clutch, use your factory one meant for the sbc. You'll have to enlarge the clutch holes a bit to make room for the metric bolts. You'll also have to knock out the alignment pins on the flywheel. As far as hydraulics go, you can reuse your throw out as well. I've been driving my truck since January as a daily with a 40mi round trip 5 days a week with no issues

One last note, I can't remember what year range they were from, but early 4.8 and 6.0 engines had a longer crank flange for manuals than automatics. All later 4.8 and 6.0 have a narrower crank flange like the 5.3's. I don't remember what years they started doing the same thing but I do know the earlier models had two different cranks. Make sure you have a 216 crank. Same part number for the 5.3 and 6.0. IIRC the wider crank flange is a 215 part #. If you have the wider version then you cannot use a 1050 flywheel