Actually ya don't have to drain the oil. If ya let Girl Friend sit over night there isn't much oil in the hoses. On mine I just uncoupled both ends and I didn't even need the rags I'd put at both ends. Nothing even came out of the hose, as I think they're pitched toward the cooler. Just don't loose the O-rings at the cooler end as they might be NLA also.
Yea I was watching that thread with Tyler's presentation. Makes me wonder about how effective those aftermarket coolers work, do any of those have T-stats? Actually his presentation made me question the wisdom of our entire coolant/oil cooler system in general. That by-pass chit, and the 240* oil T- stat....If I remember right, Mobil says that the oxidation temp of M1 is somewhere above 375* and it's flash point is like 450*(?). How hot does it get a the bottom end journals?
Tom