Hemi k frame? Gurus true or false!

I do have a spool mount K-member that a friend of mine and a creative fabricator , modified that can be used for SB or BB. I forget the exact numbers but I think it is 1" difference on the passenger side and 1/2" on the drivers side. Well he made the spool mounts adjustable so that it can be used for SB or BB.

that is creative to make them adjustable ....I have cut re-welded them before, for BB use but there was no going back to SB once I welded the heck out of it.