Jared, you MIGHT see two, the other being a S2 test car. Hopefully anyway, by WCBF. Although there won't be much to see by then.
Oddly enough, the inner core was selected primarily for size, as this method dictates fit over function. Luckily, I found a core that has some 'added technology' in the way the fluid circulates. You see it in the pics above, but what you don't see are inserts in the straight sections that force the water to swirl in a helical fashion, increasing thermal transfer on the outer surface of the feed tubes. I have the 180° fittings sweated off the end of one of them in order to slightly shorten the core (I always buy two of things like that when modification is necessary) and I'll try to get some pics showing this effect. Hayden manufactures them. No part number just yet, as I don't want to cut that information loose until I know it'* a good fit. Mine has to be shortened slightly to fit where it needs to, so I'll be cutting, flaring, and re-soldering. I have aluminum solder here already. In fact, I have my next LIM and that very core sitting right behind me at work right now. They're going to the machine shop at 4pm.
The beauty of the system is that it requires no modification to brackets or fuel rails. That'* a significant cost savings, particularly for the Series 1.