Battery ground wire and hot wire section

Hi guys,

Thank you for your replies.
The kit I bought came with a 2 gage red wire and a 3 gage black wire both 14 feet long. I had difficulties trying to crank up the engine and wires were hot so I guess I have to replace them. I will go for a 2 times bigger red wire but I wonder if I have to pay to replace the 3 gage black wire too.

I'm not sure I'm clear, or maybe I didn't understand well but I don't use the frame to carry the ground to the engine : I routed a wire from the battery to the transmission bell housing bolt and then the frame is linked to the ground with a short wire routed from an engine mounting bolt to the frame.

Nico