Will 70 Dart V8 K-member fit 65 Barracud?

I'll have to look again, but I don't remember the K-member under the slant six looking as beefy as the one in your photo. Yours seems more boxed in where I was thinking mine was more angled steel with less enclosed "boxy" areas.

Its not my K member in the picture, it’s from Firm Feel’s website and it has been reinforced. So some of the open areas have been gusseted.