When we had our popups I would put a length(end to end of the bumper)of 5 or 6" pvc with a plumbers threaded cap u bolted to the frame extensions for awning & canopy poles.
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Larry & Rachel Demers 2013 F150 Eco Boost Super Cab 6.5 bed 6 sp. 3.31 4x4 White Hawk 28DSBH