Adding FT Sway Bar - 69 Dart w/Later K Frame

I finally ordered the Hellwig sway bar 55905. As mentioned, I have a 69 Dart w/the later k-frame, spool mounts, no sway bar tabs. I started mocking up the install and found that the LCA surfaces where the L brackets mount are not flush like in their instructions. The raised area is right where the hole needs to be drilled and the L brackets do not sit flush.

Anyone run into this and if so, what was the resolution?

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