So your freshly wash Mag20 looks a lot better than mine! Anyways, here pics from this morning.
Here's the factory 2072. Note the circle and where the hard lines to flex line coupler is located above the sheetmetal on the 72/82 series. I had an issue with the couplers putting the Cyclops Mag20 in the 782.
Here is the Mag20 in the 782. A few things to note. The red circle is where the coupler ended up. Obviously I cannot slide it up the steel line further because the line is flared. Also note there is an obvious rub mark on the sheet metal where is was rubbing in the donor. The problem is, this coupler is too fat to fit between the engine and the side panel. So I can't run the side panel right now.
Secondly, The oil filter has to be as high as possible above the frame rail in the yellow circle. Or again the side panel won't fit. I ended up slightly flaring out the bottom of my panel to get a "no-rub" condition. Ultimately I noticed the fuel tank in the 2072 is about a 1/2" higher then my 782, that would have given plenty of clearance on the 782, but I had already drilled the holes.
Here you can see where the 2 bolts holding the adapter come through the firewall, I had to drill these on my 782. It's also important to notice the 2072 firewall has a notch near the gas tank strap to allow the lines to go through when the side panel is on. I had to cut this into my 782 also.
On both tractors, I have to loosen the 2 oil filter adapter bolts and slide the hole thing out to change the filter. It only takes a 2 minutes and because the adapter is slotted the bolts don't have to be removed. It also is nice because any oil that comes out when the filter is removed can be directed away from the tractor instead of running all over the frame. I feel you would have oil all inside your engine metal if you were to set it up like the Onan.
Hopefully, my goal is to replace these old leaking cloth/steel lines with braided steel hoses and -AN fittings at both ends. And instead of running out the side of the panel, I'm going to run them up through the top of the panel where I have the green lines drawn. This should remove and rubbing and clearance issues.
It's worth noting that even though the 2072 has higher couplings, they still rub both the engine metal and side panel. So if it works on the 782, the 2072 will get the same treatment.