Rory:
That '79 Fairmont I had must have been an oddball because all the stories I had read about the 200 six having a special k-member worried me when it came time to do a swap.
I had 460 Fox swap mounts and a rear sump oil pan and the ol' 460 slid right in there on the stock k-member.
I know no-one had messed with that k-member because the car was all original when I got it. I paid 50 bucks for it in 1998 and drove it home.
Pic of it as a bracket car with a 460/C-6 8.8 combo.
I bought that car 3 times, hence the Boomerang name. (it kept coming back)