LS1 or LS2?

[350ZNV]

So I have been debating between swapping an LS1 or an LS2 into my '70 Chevelle. Either one I choose will get a Magnacharger roots type blower on it for an extra kick. By looking at the prices, the LS2 is not that much more expensive than the LS1 out of the box, so why does everybody go LS1? Is there a lot more hastle when installing the LS2? Can the T-56 hook up to either one? So far I am leaning towards the LS2, but then again, I have just started my research.