As said by Warren put your cyl. 1 at TDC, ignition stroke. For that check through the oil filler cap if both cams are facing up. If not rotate the engine 1 full rotation. When you are there make sure the rotor is facing the HT lead of cyl.1.

If you have a euro version (Bosch dizzy no 0 231 302 001 or 0 231 401 001) the value are the following:

Starting (cranking) speed with spark plugs without vacuum: 10 deg BTDC;
Idling speed with vacuum: 3 ded +/- 1 ATDC;
1500 rpm without vacuum: 12-20 deg;
3000 rpm without vacuum: 34 deg;
4500 rpm with vacuum: 34 deg;
Ignition timing vacuum control toward retard at idle speed: 7-13 deg.

If you have a US version with exhaust emission control (Bosch dizzy no 0 231 302 002 or 0 231 401 002) the value are the following:

Starting (cranking) speed with spark plugs without vacuum: 10 deg BTDC;
Idling speed with vacuum: 6 ded +/- 1 ATDC;
1500 rpm with vacuum: TDC +/- 1 deg;
3000 rpm with vacuum: 30-38 deg;
Ignition timing vacuum control toward retard: 18-22 deg.