Yes it is flying. Impala's going 9 seconds are rare unless they're all out race cars. 409 is cool. I know someone in my area with a 409 SS and he blew up a tranny a while ago trying participate in a test n tune at the firehouse training.
Lots of power hit the drive train and pow. His car is so cool.
I wonder what track would let him run 9's without a cage? I know a guy that has a '64 SS Impala with a W motor (over 500 cubes now) that says if he goes much faster, he'll have to put in a cage. I don't remember if he said 11.50 or 10.00 sec. was the cut off.I watched him try to make a pass this summer and he bent a control arm frame mount on the launch and had to put it right back in the trailer.
Going fast in a big Impala is a lot more work! A few guys around here are doing it with BBC engines in the 468 and bigger size, but none with a cool W motor!
I missed out on a local CL deal where a guy had made adapter valve covers to retrofit modified Edelbrock 409 covers with a plate to fit BBC heads. The work was over the top, and he wanted $295 for the whole setup. I called right away, but they were sold. I thought they'd really mess with people's minds if I had them on the BBC in my Falcon and tilted the frontend open!
There's a guy here locally using a 409 in a '62 Chevy that's street legal and turning unbelievable times. But in talking to him the engine isn't actually a stock bore/stroke 409 anymore. It's closer to 460 c.i. but still impressive to do with a street legal big Chevy and a W motor!