Yeah, your problem may be the carb vaacum hoses. Replace them, then the acceleration enrichment will work fine and the engine dont die's anymore by acceleration.
Or you have already replaced the vaacum hoses and you made a mistake.
we talked via Facebook ( http://www.facebook.com/5marchk10 ).
As i said i think you need help from a Motorsport supplier. Those Engines are made 1989, thats 25 years to now.
Nissan has a bad serviceparts policy. As example, the mirror base, wich hold the indoor mirror at the roof is no more...
some days after the big forums crashed i'd like to introduce myself and my car for the once again.
I don't want to write all the detai's again, so i start at this point as the forum crashed.
My engine is now build in. It has 470KMs well done. After fixing some problems it runs...