The sniper would probably be easier but ditching the 3Fe intake manifold would be a downgrade in performance. You would be better to go @cruisermatt 's advice and retain the stock intake as its properly tuned to the airflow needs of the engine. Plus it will look stock which has other benefits.
You can upgrade the management system without downgrading the mechanicals of the engine.
That being said unless you are putting more air into it (via camshaft events, or forced induction) or controlling ignition timing (getting rid of the distributor in favor of COP) you will gain practically nothing in terms of performance.