Scott, do you have any salt and pepper for the crow I'm about to eat? I saw your last post and had written up this MIGHTY reply, but thought I'd a bit of quick research first...I found this site that has a lot of good info, and well respected...man, I hate to admit it, but...well okay for race purposes ONLY, then...you are right about the restrictors...see below, and surf the site, lotsa good info on cooling:
http://www.stewartcomponents.com/html/tech_support/
Thanks for the "nudge" to get me to edjumacate myself...I'm VERY surprised that these guys consistently recommend no T-stat and no restrictor (usually for race motors or major cooling problem set-ups). It apparently has to do with their pumps providing MUCH better flow...so, I slink off into the darkness...