If it runs well, you didn't bend anything, and if the timing marks are in line, the chain is perfect.

Your rough idle is another problem. Start with looking for a vac leak, certainly, but don't ignore the secondary ignition system -- bad plugs, wires, cap, or rotor will give a rough idle.

So can a bad engine mount, by the way, check those too. If you have the spherical gell filled ones, if the rim is less than about 3/4" from the frame, you cannot see the tapered portion on the bottom, or you find sticky goo on it, it's shot.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!