The vortec is better than the jrsc just b/c they can be inter cooled, which means more boost safely, but i hear they're not as responsive as the jrsc root style, but i think the more boost would make up for it. I believe u dont see as many is b/c of the $5000 investment, you could turbo and build a engine for that price. I like my jrsc but only good for 10lbs of boost and the eaton units only really like producing 6-8lbs according the eaton flow charts or some crap like that......Gl man you'll definatly be origional if u go with the vortech though