I had a leak, assumed it was the pressure line as oil all over the place underneath so hard to tell source, what I learned was:
1. contrary to aftermarket parts supply directory that showed only one part for the V8, there are two, mine being of course the other one, so buy the part from a dealer!
2. Can change yourself if handy, actually small hands a benefit..lol... Not much room to tighten the nut on the bottom of the pump..
3. Actual problem wasn't that at all, the alum. line to the cooler rad. had a pinhole (and I mean pinhole) corrosion pit in it just where the rubber line attaches and where the open cell foam bit on the air dam nicely traps moisture salt etc as the alum. line passes under the rad! I cut the alum bit a bit shorter past the pinhole part, and put a longer piece of rubber line and all ok.
Jack