Collin......I have read at Slowtwitch for many years but not a poster. It has mostly a Triathlon focus and therefore many runners turned cyclist who could offer you support. There are two forums I look to for aerodynamics, ST being one of them. Aero is hugely important in cycling. If your cycling interest is mostly Zwift and time trials, ST is a good place for you. If you are interested in road racing or criteriums, not the best place for that. A 180 pound cyclist with 73 ml/kg with a couple years of training would be one big hell of a motor. As a runner, you probably focused on economy/efficiency. Nobody talks much about that in cycling but there are 65 ml/kg world champions and an ex-pro from Norway who couldn't make it on 94 ml/kg. Aside from skills and tactics, your ability to utilize a high fraction of your V02 max and to recover from blindingly hard efforts over and over will determine your success more than raw O2 consumption. ST used to have good contributions from top Physios like Andrew Coggan but the noise over there killed that signal. GL on your journey but get out on the bike and ride, preferably up grades a couple times per week. Find a couple local 4-10 minute hills used by local hammerheads on STRAVA and aim for top 10. Keep lowering your time.