Maybe you can - we shall hever know, so you can only speculate - but climbing and endurance are my strong points.
Climbing in particular, having a powerlifters legs and a cylcists lungs make me astonishingly good uphill beyond all reason. Also having a lifters arms (18.5"), shoulders and grip gives a steadier and stronger platform against which my legs can push forwards. There are, of course better climbers than me, but you know what...I've yet to meet many of any age, fitness, or skill level.
Its sustained speed on the level where I suffer, and thats the aero penalty, not the mass. 8 or 9/10ths effort for me is a lot harder to maintain than it will be for a whippet like you because im built like a giant air brake. The maths are simple enough, if you know the size and speed you can calculate the aerodynamic load, and the energy required to overcome that is a lot more than the energy required to keep the mass alone moving.