Battery ground wire and hot wire section

Hi guys,

I relocated my battery to my trunk. I faced fact the (european) relocating kit I bougth came with a hot wire with a too small section regarding its length (4.5m / 177in) : 35mm².
I plan to change it to a 70mm² wire (00 AWG). I guess it should be ok.

I ran a 25mm² ground wire (3AWG) from trunk to security switch, then from switch to tran bell, then from engine to frame.

My first question is: do you think I need to upgrade my ground wire to a bigger section one?

My starter is a ministarter but wired with the stock mopar starter wire. Is the section of this wire big enought for a mini starter? (Engine is a 383 with 906 cylinder heads, I dont have the exact compression ratio but it's not been stroked or bored)

Thanks from France,

Nico
Nico, Your ground sir should be at least the same size as you power wire.