Hello Bruce, Can you tell me more about your Demon? I am installing a 392 w/727 in my 67 Barracuda FB. It was a race care for years w/ a big block 440 and a 727. It has no motor mounts as a block plate was used. What motor mounts did you use? What exhaust did you use? Which oil pan does your engine have? Do you have stock suspension and steering? What about your master cylinder are you using an angled adapter? Thanks John