Was going throught the FSM on reintalling the Intake and exhaust manifolds as I will be doing this tomorrow when my parts get here...

It mentions replacing the nuts that hold the manifolds on.. And when i looked them up from my parts supplier they show 2 different sizes of copper nuts? I searched through all the threads and couldn't find anyone that had mentioned this. As far as i can tell all the studs take the same size nut and the old ones are not copper I am also missing some of the nuts from whoever took the turbo off the engine at the pnp. Thats why i was thinking of just buying new ones.

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1987 300D 180k
1985 300SD 330k Helga
1992 300D Lola 269k- Sold
1986 325 coupe Bessie >300k Original engine(ODO Broke) sold
2006 2500HD Druamax Linda- Tows boat and looks pretty in garage thats about it