ESC and Motor, is the bare minimum. Before you start going through axles (if non EHD) and trans/diff gears
Ideally 2s on a higher kv motor (around 4-5000kv) and stock VXL gearing (23/86) is more than enough power for a 1/10 2WD SCT IMHO.
I run Hobbywing 10BL120 G2 WP with a older ezrun 4000kv 4 pole G2 motor, on 2s. 23/86 gearing. Can get about nearly 38 mph. Torque monster too. Granted I do run 272R transmission with a sealed diff, more like tune and durability option instead of a speed thing but still.