Trick Flows on the 440.....

[Black_Sheep]

Sounds good. It has that "water" sound because of the mic on the phone? (I guess) you used to take the video.
Sometimes a little more distance can help eliminate that.
Here's one of my beloved Roadrunner:

My wife, who knows nothing about cars just said “that sounds just like your car” when I played your video. The .509 has a very distinct sound…

 

[69 GTX]

238/[email protected] solid roller .615 lift with lash subtracted.
3" TTI with super turbos

 

[69 GTX]

Black sheep I agree! I had a 509 back in the day.