1970 Duster

not sure what they are, was your car a slant 6 to begin with?

from the factory, the mounted the trans to the engine, engine to the K frame and dropped the car over top

ive only dropped the engine in from the top, but thats the only way i know how to do it, most guys who have done it, swear by doing it the factory way

and i would put the mounts on the engine first