Yup, I've replaced all the major cables on my truck, really helped with starting and it is a good idea to toss out 20+ year old wiring in install new stuff. Go heavier!
I went to a battery shop, bought a bunch of #4 cable, a handful of lugs, and a staking tool. Went to town. All the new lugs got staked, then soldered, then shrinkwrapped. I also upgraded the battery terminals to the Mil-Spec ones, bought from Wrangler Power Products. But I didn't measure anything or write it down, sorry. I just replicated what was there.