Gary,
Jegs also sells Flex-a-lite sandwich adapters. I can't find them in the catalog but I called Fex-a-lite and was told to ask for them. You can also get them from NAPA. Jegs is pretty reasonable on the price of the Perma-Cool adapters. I like dealing with jegs.com. The adapters are for oil coolers. The only reason I can use them for the highly restrictive Motor Guard is the system is designed to deal with a clogged oil cooler. The Motor Guard is the same as a clogged oil cooler. The adapters for cars with the relief valve in the filter like a Ford, Chrysler, etc, will have a relief valve. The oil simply takes a short cut to the full flow filter then to the engine parts.
With the GM adapters it gets more complicated. The Motor Guard causes the relief valve in the mount to open and bypass both filters. You have converted your system to a straight bypass system like a 53 Chevy. That wouldn't be a problem for a well maintained engine but might be a problem for some engines with large chunks circulating in the oil. What do you do? You can drill the adapter. If you drill too large a hole the resistance or pressure drop thru the adapter won't be enough to feed the Motor Guard. Drill it too small and the stock relief will stay open. You can convert the GM system by plugging the GM relief valve and using a sandwich adapter such as a Perma-Cool universal adapter with a Ford filter.
On the bosses 6.0 Chevrolet pickup I will use a Flex-a-lite sandwich adapter with the thermostat relief valve and drill a 1/4" relief orifice. The Motor Guard won't get much oil until the relief valve closes after the oil heats up. The pressure drop thru the 1/4 orifice should heat up the Motor Guard. If the oil pressure reads good on the gauge and both filters get hot it will work. Make sure you have a good engine before installing these systems or a new rig. I would install the system on my new rig as soon as I get home then remove the system if the engine turned out to be a lemon. When I drive off the lot I probably won't see them again. They can keep their free oil change. Engine problems are rare these days. Problems usually show up before you install the submicronic bypass filter.
I am pretty sure the 6.0 will take the Flex-a-lite part 3966. The same as my Chevrolet Celebrity four cylinder in my Farmall H tractor. Right now I have a Perma-Cool universal 189 with a Fram filter on it. As you can imagine it is well filtered
I don't do dual remotes unless it is for big oil lines ATF filtration or if the full flow filter is hard to get to.
I set up a Duramax Allison ATF spin on filter mount to take a Perma-Cool sandwich adapter universal 189. It allows larger spin on filters with the Motor Guard to clean the ATF. You can use as large a size as you want limited by the clearance you need. For some 1/2"-16 mount and adding a sandwich adapter to the Ford mount. A dual remote system that cleans oil without restricting the flow. I love sandwich adapters. Been using them for about 20 years. I don't punch many oil pans. The Duramax looks like it will take Flex-a-lite 3964. They have the spring and ball relief valve. Squeeze a M-30 under the hood and kick butt. Drill an element bypass orifice in the Motor Guard and use it in series with an oil cooler for the motor oil. There are a lot of choices. The sandwich adapters are great tools.
Ralph