K frame ?

I have a 72 duster 340 that was raced, someone cut and modified the K frame, I would like to go with big bolt pattern spindles, since this Kfame is all boogered up I am considering finding a new k frame out of a 73 and newer v8 abody, is there any issues with doing this? I understand I will now have to use spool type engine mounts. I am using a 360 in the car. can anyone think of anything I need to be concerned about>?

thanks a bunch!