Just about any heavy truck or equipment shop should be able to make you custom battery cables. My local NAPA had a set made for me before I started making my own. There is nothing wrong with side post. The correct stackable ends make great connection. (20) DIY: - Making New Battery Cables for a 93- 6.5 | Diesel Place
I've to second this, I have never heard my engine turn over faster than before. I let the GP do it's thing for like 3 seconds and it starts instantly. (10c*)Can't say enough about the battery cable upgrade. I made my own with 1/0 because that was the biggest I could find in town. Spent like $150 on all materials. With upgraded cables and a new starter I've never seen it start this fast. When it's warm I don't even use any glow plug and can practically just bump the key and it fires right up. (I have manual glow plug switch) Get some!