I’m using the D585 coils only because the internet says they are better. Haha. Are they really better, who knows, but the salvage yard employees won’t know the difference so the price is the same. These can be found on the 6.0 liter LS platform. I’m sure you can find them at any of your local pull a part salvage yards for $20-30. Make sure to get the brackets and all connectors even if you don’t plan to use them. I haven’t had any problems with mine, so there’s no reason to search for an alternative. I’m not one of those guys that need to have name brand BS parts for certain things. Buying $100/each MSD coils is a waste of money for what I’m doing. Why not use a factory part that I can buy a replacement at any local auto parts store if I break down on the road.
