Just keep it aside until you do:) The rear axle looks like its been replaced,no pitting at all? The engine is an M5 S3,there is another in my wanted forum ICAA00000. And from those images the front axles are model 2 not 1.....They are bent,So id say its a Model 2 Chassis,Since youve already measured the rear axle and came up with Model 2,id say thats correct:) And im sure you have a spare engine or two now....lols.
