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Well, a few days ago I finally swapped out the Demon 650 Vac Sec and the Holley Street Dom with an AED 750 DP and Performer RPM and it has made quite a difference in my 9.0-1 383!!!! Throttle response is sick! And the whistling issue has gone away too!!! My combo is: 1971 383 Magnum 9.0-1...

Ok, so I finally got the Dart/383 on the road today. Seems to run ok. I did run into a few issues though. 1) Under full throttle, at about 3500RPM I frequently here a whistling noise that lasts a few seconds. Almost sounds like a loose belt. I checked all the belts and they are nice and...

First off, thank you for all of the responses to my initial questions about my new Dart/383 I recently bought. My question is this. Currently there is a Holley Strip Dominator and Demon 650 Vac secondary carb on motor. I really think I want to change that to a Holley 750 DP and...

Hi all!! First off, let me just say hello to everyone as I am new to this site. I've been a Chevy man all of my life, but as of last Sunday I now have a 1974 Dodge Dart with a 383 Magnum sitting in my garage!!!! My question is with the motor, since I really don't know much about...