Where's the bleeder valve? My '03 Cobra had one as well as my '05 GT. Should be on at the high point of the coolant system but as far as I can tell, the high point(s) is where the pair of 3/8" lines attaches. So who can step up and claim they are the all-knowing one here?

 

no clue. Can't it be burped through the rad cap??

 

The GT500s have a continuous high point bleed. No need to purge air after refill. Ford does make improvements sometimes....