HEI questions

I thought I already had a post asking about HEI systems but I couldn't find it, so sorry if I'm repeating dumb questions.

So as I understand it, I would no longer use the ballast?

I was looking at this kit for my 440 on ebay: BB Mopar HEI Eletronic Distributor Ready To Run Chrysler Kit Dodge 413 426 440 | eBay

At first I looked at MSD but there's a huge price difference between MSD and many others I've found online. Would the above kit give me everything required to make the switch?