[Rezz]

Energy Output: The amount of power supplied to the rest of the mech so to determine what configurations can be used (unless you want the engine to be considered a secondary component)

Durability: The "hp" of the mech, using whichever system you guys end up going with.

Weight: Could be either an encumbrance type number (as in, mechs with this chasis equipped cannot exceed x lbs) or a static "this weighs x amount"

Number of External Mounts: The amount of things that can be attached to it, this could also take into account the number and type of leg/tread/hover assemblies and arms.

Number of Internal Slots: How many non weapon/defensive parts such as radar assemblies, targeting, lock defining parts and what have you inside the chasis itself.

Affinity: Which type of body-type (heavy/light/medium) the chasis is designed for, could also indicate A pre-designed preference for specific configurations, ie, "set bonus"

Propulsion: Rocket/Space power/energy consumption/heat generation and overall statistics such as duration and what have you (unless this is entirely terrestrial with rocket packs being extreme limited use. Like engine, that could be an external/internal separate part)

Heat Generation/Reduction: the rating determining how good the coolant system is or a number that simply adds onto the overall heat generation of the mech, depending on if you want the number to be good or bad.