"Rolling your own" cables using #2 is great so you can dress the cables exactly where/how you want. You need a good crimp tool.
I prefer and have side post, 78 series battery, on my 72 and buy premade #2 cables the length I need. I found a link on AC Delco cables that breaks down cable size & length so you can pick a part # that meets those needs. The part # itself will not be the one for your truck per say but be the gable gauge and length you want.
Then I just order that part #. I typically get them on Amazon for a very reasonable $
This one for example also has insulation on + cable where it runs along the engine (2=#2, 43= ").
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1