Never tried this before!

I am currently in the process of a 440 swap in my Demon.

Special parts needed are from:

Schumacher Creative Services
Blow Out Proof Poly-Loc™ Mounts. Note: We are currently transitioning our ... Schumacher Creative Services founder Michael Schumacher is proud to show off ...
www.engine-swaps.com/

and:

TTI Home page
TTI Performance Exhaust and Headers. 1555 Consumer Circle. Corona, California 92880-1726. Manufacturing / Warehouse location. Product Info / Tech no. ...
www.ttiexhaust.com/

and from sources like Summit Racing(summitracing.com)

Mancini Racing(manciniracing.com)

and of course, ebay.

Also see bigblockdart.com

and this site for more info, David.