I am installing a new longblock. Its a 1995 4.3 Vortec carber 4 brl. with the thunderbolt IV system. The Mercury manual that I printed out from the links here state to follow these steps. Is this all that I have to do to set the timing correctly
Ignition Timing to Initial Timing:
8? BTDC
1. Connect timing light to No. 1 spark plug. Connect
power supply leads on light to 12 volt battery. Refer
to ?Specifications? for cylinder numbering and
location.
2. Connect tachometer to engine.
3. Start engine and run at normal idle speed.
4. Aim timing light at timing tab, located on timing
gear cover and crankshaft torsional damper.
5. GM engine timing marks (on tab) are in 2-degree
increments. MCM LH engines will have ?A? (Advance)
mark to the left of ?0.? Timing must be set
on the ?A? side of ?0? (Top Dead Center).
a - Degree Marks
b - Timing Mark
6. Adjust timing by loosening distributor clamp and
rotating distributor body as required until timing
mark on damper or pulley lines up with the mark
on tab specified in ?Specifications.? Tighten
clamp and recheck location of timing mark.
7. Stop engine and remove timing light.
thanks
Ignition Timing to Initial Timing:
8? BTDC
1. Connect timing light to No. 1 spark plug. Connect
power supply leads on light to 12 volt battery. Refer
to ?Specifications? for cylinder numbering and
location.
2. Connect tachometer to engine.
3. Start engine and run at normal idle speed.
4. Aim timing light at timing tab, located on timing
gear cover and crankshaft torsional damper.
5. GM engine timing marks (on tab) are in 2-degree
increments. MCM LH engines will have ?A? (Advance)
mark to the left of ?0.? Timing must be set
on the ?A? side of ?0? (Top Dead Center).
a - Degree Marks
b - Timing Mark
6. Adjust timing by loosening distributor clamp and
rotating distributor body as required until timing
mark on damper or pulley lines up with the mark
on tab specified in ?Specifications.? Tighten
clamp and recheck location of timing mark.
7. Stop engine and remove timing light.
thanks