manual how to adjust the 3.5 engine (ignition and A/F ratio)

[werminghausen]

I have 'new' heads on the engine. engine runs/ valve timing is great (cams lining up almost perfectly) ...well but the problem is that car is very sluggish and I believe it is not well adjusted.
Can someone guide me through proper adjustment in terms of ignition (distributor) and A/F ratio (fuel air mixture) or what else.
I think I adjusted dist. at 5 degrees after TDC yesterday (with vacuum) and I am running fuel pressure at 2.9bar.
Engine is too sluggish and doesn't want to jump when I press the pedal.
Martin