First, the oil filter cap must be modified and that will be exchange on your UNbroken core. For the sake of common sense and to cool better, the radiators fill and empty at the top, so most - if not all - additional oil will remain outside of the cases. Both stages tap into the oil filter cap right where the oil filter sits, this is the out up to the radiator. The normal flow will be interupted by a loctited setscrew and the second fitting will be downstream of that. The larger version will mount high off the front top engine mount and braced aginst the lug on the front of the crankcase. It's big: 15 rows and it has a 7 inch fan that will be controlled by a temperature probe. Way back when, there used to be an oil temp thermostat. I think Lockheart sold it, but they are long gone. The other cooler will consist of two 10 row radiators, mounted outboard of the top front motor mount, also possibly anchored to the lug. Either kit can be installed with hand tools at any time.
The hoses will have a little slack in them in case you want to shorten them for a trimmer look. I'll be looking to develop SR/TT/XT500-style (after-market) passive radiators for the oil feeds into the heads - price currently unguessable; they may never come to pass. Also I'll be looking for an easily readable oil pressure guage mounted on the front exhaust rocker feed.