Also,
Check out this guy's TF LSx build:
https://www.trifive.com/forums/showt...t=97044&page=6
Radiator info starts at post #208.
If I had it to do over, I'd probably do what he did. But, he did this after I had already did my install. Mine is only cooling a 305. For an LSx, I'd opt for a cross-flow radiator.