one other thing thats been on my mind :
something i remember from research in the BHG area ..
the trouble with adding high performance cooling and cooling it down is that you aren't really finding out why it's running hot .
if there is a a real problem causing it to over heat and it's not the radiator . then what ? is it running lean ?
with your block/head history your n/a should not have an issue with temp .
i'm always paranoid about high temp and bhg 's