think what you want, and the dope at 3800 pro. coolant is under pressure, the oil is not.
big hint here is theres no oil passage between the lim and head either. your valve covers leaked i bet. if you had pools of liquid on the lim valley bolts, thats coolant that seeped up the bolt threads and valve cover oil. why you reseal the threads on those bolts.
live and learn more please.
Scotty, FTW!
Comp G. E85, 2.8, Headers, Tune, Intake, S1X, 105# springs, 60 # injectors, 255 walbro,etc.