Here's a link to the information on BB engine swaps (it's from the Tech Archive section of the forum).
http://www.firstgenmc.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=244753#Post244753
The Parts Place has them - part no. AT6545Z Crossmember Insulators (rubber) - $19.00/pair. They also have the brackets as well. They are also in Illinois.
http://www.thepartsplaceinc.com/
Quick link is also in the FGMCC "Parts and Services" section.
No wonder those '72 rear trim pieces are so hard to find - customizers are slapping them on other years.
Be interesting to see a front end shot, what with the rounded, forward-opening hood.
About time I posted my "mug."
I'm with the Commemorative Air Force's (Southern Minnesota Wing) P-51C Mustang honoring the Tuskegee Airmen. I'm a big supporter of the project.