...BTW your Bieber avatar is awesome.-Malone
Love your sig.Looks like a leaking injector caused it, but it doesn't look that bad. If all the bores are good enough to run those pistons then I would not have an issue running them. The pic is a little big when blown up but from what I can see it doesn't even go down the crown.
You can live without the oil stabilizer in the pan. They used to sell those on germanautoparts for like $5. I hope you are at least planning on using a dingleberry hone on those cylinder walls. These engines produce a lot of glaze. They also oval the bores a lot as well. Goetze brand rings are the best (overall) and can be purchased from autohausaz.com for about $13 a hole.
i threw in some meyle pistons for around $150/set, not the best but can get you a few 100ks of work. since you have head off maybe time to do some work on it, new valves/springs,etc, machine work on head, i consider like exh valve guides, machine seats for new valves. new lifters, dont forget them,,and since you have rods apart theres some more things you can do.
look up vw diesel parts on browser, shopped for them a few yrs ago, forgot from who by now, just dont buy from hans/prothe, i got trw valves from someone to, like $30 a pop for exh,cheaper for int. got a good few miles on them by now, got 2 sets. 1 hasnt broken in yet. just sits there, have to get the vac pump o-ring i swapped out into my good1, figure i can charge batt and she'll start right upoh, and valve springs for ~$25 each,etc.