Not HD specific, so this could be completely moot. I put a 180 lb bumper/ winch assembly on the front of my 18 wrangler. It sagged the front about 1”, which progressed to 1.75” over a couple years, which in itself was expected. What I didn’t expect was the extra mass hanging so far forward, on a sagged suspension, meant I’d hit bump stops over speed bumps or deep pot holes. While the front was only sagged 1.75” at rest, it didn’t take much more weight to sag it even more, either by standing on it, or bouncing it over rolling roads. The problem was solved with a lift that had higher rate springs, and a 3/4” puck leveling kit. But, totally different animal. Softer front end, with minimal up travel. Not sure what the travel is on our HD, or if we’d have the same issue, but 300 lbs that far forward of the coils will absolutely create sag and a softer feel up front.