Quoting 7 wonders of the world: Guy,
Assuming the replacement cams are more performance oriented then the OE timing slots with the locking bar stands a very good chance of being way out - these should be clocked in to establish running clearances etc and then adjusted on the rollers to optimise performance. Not sure I understand your question as I do not have verniers fitted, just standard pulleys.
Fitting high performance cams is exactly the same as fitting standard OE ones.
At the opposite end of the cams to the pulley, your see a slot in the end of the cams (this slot is exactly the same on Standard and Kent/Piper cams).
With the bolts on both cam pulleys loose, line the slots up insert a locking bar which locks both the cams together and the bar sits flat on the face of the head, the bar will only go in when the cams are BOTH in the correct position, set No.1 to TDC with a dial gauge, make sure the engine is still at TDC, then tighten both the cam pulley bolts and remove locking tool. job done
The only way I would ever entertain adjusting individual cam timing is if I had verniers fitted.
Guy