Barrels turned and hexed, X motor mount (Perewitz?). . . and that custom cast primary cover. First, I thought it was an XLH cover all smoothed out, but they only have 3 screws - unless they machined and countersunk extra screw locations for the XLCH case 1/2? Huh? Lots of work on this one. I don't believe hex head cap screws are a good way to bolt down cylinders, but who knows . . .
I love modified "stock" parts.