PS.
1G rod - small end 21mm diameter by 29mm width (Same as E39 VR4, rwd Lancer,Starion)
2G rod - small end 22mm diameter by 26.5mm width (Same as evo 1-3) [4 to 7 ???]
All rods centre to centre length 150mm.
Big end 48mm diameter by ??width.
Older 1G rod is the strongest - good budget upgrade with a little machining.
Mitsubishi thinned the later rods to save reciprocating weight - good for engine response.
They also have reduced piston mass so the rod loading is lower.
Also with the introduction of FIA restrictors in rallying - torque and HP were theoretically limited so big fat rods were no longer necessary.