Should I replace the CNC master with a Wilwood master? I guess it could be replaced if the original failed.

The CNC master as in the kit has a flange welded onto it. Yes I'd replace it.

I just checked the DSE site http://detroitspeed.com/1967-1969-F-...line-pg-1.html

The bracket and tilton adaptor are a smoking deal, and allow you to use a standard non-customized master that can be replaced easier than the Keisler modified CNC master.

Going with a standard aftermarket configuration like the tilton will allow easy customization of MC bore.

Seeing that DSE stuff, I would have gone that way rather than modifying 4th gen stuff if it had been available when I did mine.

Let me know if you guys are looking for a mount. The next batch is on order.https://lateral-g.net/forums/showthread.php4?t=43781

You can piece it together. I don't have a full kit yet.
Details in link.