Good thread guys....
I found it pretty easy to install my 572 with Indy heads in an Aussie A body....whose engine bay is identical in dimensions, K frame bolt holes, inner fenders, suspension mounts etc to a US Demon/ Duster.
I used a HDK front end for a US A body and it went straight in as well, ostensibly other than the steering rack its exactly the same for the Aussie A body. In terms of fitting the engine in the bay, shock tower clearance etc it was easy. A little massaging of the sheet metal at the shoc tower but nothing radical or crazy and TTI E/B body 2 1/4 headers went straight in.
I did center the engine and putting it in was a snap even with the wider Indy cyl heads/valve covers.
I did away with the wiper motor and MC in the engine bay and mounted both under the dash.
Some pix...