Place "penny" somewhere next to battery connectors, it
will slow down the wire oxidize lol . I used to work
for a guy who was doing it to every customer car...
hehe. Well hey it works
Anyway lots of ground points go bad after years ,
Especially the main batter ground and gorund point
under front bumper ( fan headlight harness ect..) There
is general rule for the gauge size , if u alternator
is stock, standard battery then there is no need for
Beefier gauge wire between them two. Install platinum
or silver terminals that might smooth the amp flow

hehe .
Steve crank it pretty good deal by replacing some of
main feeds. Starter wire /connectors sucks lots of
amps ,plus the fact of starter located way down
exposed ... yeah 40$ well invested, i would silicone
the ends too
This charts has proven to be very helpful for some
individuals....