Old Wiring Harness touch up?

Big_John said

That is a conversion for solid wire. You want to use stranded wire. Stranded wire size is calculated by combining the cross sectional area of the individual strands. American wire gauge - Wikipedia

2/0 is another way of saying "00" 3/0 is "000"
2 is smaller
8 is still smaller etc.

If you look at the wiring diagrams in your FSM, you will see the wire size for each circuit. For example, if the wire is labeled "M2F-18Y", the wire is #18 gauge and Yellow in color.

If you don't have a FSM, download one here: MyMopar - Mopar Forums & Information - Service Manuals

Click to expand...

Now I feel stupide. Yes I do have a ´68 SM, and when looking at the wire from battery to Starter, witch I thought I had a grip of, the label reads A1-6B-R. I felt this would be too small a gauge. So I thought 6 stod for something else. I figured 2 Ga. would be more likely. Maybe I had my application in the back of my head. A trunk mounted SS Battery, witch need a lot more wire, to feed the starter up front. Simply put the SM aside.
Now I know better. Thank you, great info.
This is going to be as good as I want it to be...