Quote Originally Posted by RobertISaar View Post
some older applicatons didn't mount into a water jacket either.... see ~85 and up 60V6 applications for example. i don't think it's that critical.
That makes sense as the Gen III LS engines use a standard threaded style knock sensor that doesn't mount into a water jacket either. I'm guessing that on at least some applications the mounting location of the knock sensor was a matter of convenience in order to avoid expensive block re-tooling maybe ?