I wanted to chime in on this one as well:

First it sounds like you have a good collection of parts but you may not want to use them all. For a "mild" build, clean up the ports, single weber is fine, no more than 10-1 compression, electronic dizzy and a cam spec that is say around 265ish duration and say .400 lift range....................you could probaly get around 95-100 HP out of that.

I'm with bige on 150HP for an A14, I've seen figures for full race A14/15's around 170HP (14-1 compression, big valves radical cam,9500 RPM redline & motor life measured in hours) So 150 is 90% of race spec....................in a street car it would probably be miserable to drive. I have an A15 that I'll be building up with an eye towards longevity, I'm expecting around 130HP (100ish at the rear wheels). I'm using a ported GX head, 39mm flat siide carbs, a camshaft we'll call Rally spec & 11.5-1 compression.

Tom