Big block A body spool mount K member?

Rocky, if you put the big block on the stock small block k-member it is too far forward and slightly crooked (at the mount). If that would have worked Chrysler would not have built the DC k-member. Those are simply the facts. Yes, you can put the motor in anywhere you want it, but it's not in the stock location.

The OP's pictures look like an original, not a home built Direct Connection K-member...That does look like a homemade driver side solid mount, though.