Which k member is this?

it's been modified, that much is for sure.

73~76 K's have towers for the spool style mounts.
67~72 K's have pads for the flat mounts.

that has the pad style mounts, but they're in the wrong place. the mount is supposed to be in front of the steering box mount. and it looks like it was torched off.

there also appears to be holes for sway bar mounts on the forward lip.

my guess is that it's a 67~72 K that's been modified.

let's see some pics with out the mounts.