It depends on how well the two stroker is tuned, I had a blaster built mildly (minor port, .040 over, full fmf, open box, jetted) and when you got it tuned perfect, at a idle you could touch the cooling fins but I have never gotten a mild warrior to be that cool. I have scared up knuckles from adjusting minor things while it was idleing.
Thats just my findings. I find wrapping to be a more effective way to keep engine temps down but im not a big fan of painting on a coating on a pipe and that insulates it, but i haven't done a lot of studying of the science behind it, and im sure I should but i haven't had the time