Well that 3/4 ton rad is HUGE! It is still a single core but it has a 34" core. I stole this thing pricewise...they are about $250 new I lauged my ass off at that price.
Also I picked up a LS1 172* thermostat, that should be perfect with this monster rad.
I now gotta find that ATF heat exchanger "quick disconnect" tool and will install this thing.
Should be able to get my temps down to the low 180's.