How about inserting a Y inline between the transom pipe and power steering cooler (first thing the intake water cools) and adding the pickup line there? Would I still need a pressure relief line?
My thought is that would still allow flow through outdrive, and potentially reverse flow as a pressure relief if pickup provides too much pressure.

not to promote one site over the other
But once you get the correct sierra part number from thier website
Amazon, west marine. Marine warehouse and a few more have them
Just have to find best deal
I did Amazon because of speed
But it came from the Sierra store there
Good luck

Turns out that Sierra doesn’t carry one, but there are lots of options in the $200 range. Be here tomorrow.

Got one!

some minor adjustment needed to clear the PS pump bracket.

Inside of circ pump viewed with borescope. One smooth blade and a couple corroded blades.

thats about how mine looked
then the new one was wholly cow its got bigger vanes
Good you have a new pump

Well, engine still overheating. Power steering system puking ATF. Also an inch of water in the boat. Not sure where it’s coming from. Power steering cooler doesn’t appear to be leaking ATF or water. No residual drips or anything wet below it. ATF seems to be leaking at a joint in the actuator (newly installed Chinese model). ATF fluid below the actuator. Hydraulic line fittings are clean and dry.

Wet area below actuator

Small drip on bottom of housing

Fittings and hoses clean

PS Cooler dry

No sign of atf or water leakage on ps cooler atf lines or water hoses.