need insight to a-bodies

Brain. I think the the 66 and earlier cars use the same K regardless of motor. They just changed engine brackets on the motor ?

The 67 K frame uses a 1 year only Pitman arm that expensive and hard to find and doesnt look like a very strong set up to me. The pitman arm sit on a std while the 68 and later the pitman arm bolts in to a pocket.

73 - 76 they changed from the sandwich type motor mounts to the stronger spool mount and use a different sway bar.