I've been using my M-03L, so far with a gear diff and oil filled shocks with the arms virtually flat, on foam xpress tyres, I've had nothing but success.
I don't think a stock motor would quite fit my needs sir. I was thinking more along the lines of retarded 8 x 2 LRP Fusion motor... 16t pinion. Only running Venom 3600mAh at the max i can charge them at (8.5v).
I've got two sets of tamiya sway bars for the TL-01/FF-02/M-03, 24 or so TL-01 arms not including the full set of alloy arms and uprights I have on my drifter, TL-01 rear toe uprights, shafts, outdrives, all that. I have basically everything you said apart from the different springs and oils. Everything to make an FF-02 apart from the D-parts you mentioned.
Front wheel driven cars react much better to one-way differentials. This is a fact. TA03 one way will fit. I've got a TA03/TL-01/M-03/FF-02 ball diff at hand, but it untightens itself. methinks i rebuilt it wrong. need instructions! help me out?