If you do decide to drill it, make sure there is enough room for the shank to slide forward in the receiver.
I have a long shank on my hitch and thought about sliding it further into the receiver to stow it when I wasn't towing (it's a real shin killer!). It looked good on paper, but there isn't room on my truck to slide it far as I wanted.
Sherm & Terry w/rescues Steve (std Poodle) & Eydie (min Schnauzer)
2015 Jay Flight 27RLS (Camped: 102 nights 2015, 90 nights 2016)
2006 Ford F350 6.0 PSD, Lariat, 4WD, CC, LB, SRW, auto., Camper pkg.