Took the Barracuda to the track today for first time

It may be pig fat too.

If it won't pull up top, roll out of the throttle a little and see if it picks up. Not chop the throttle just a little. If it picks back up, it may be REALLY fat. Make sure it's not sloshing fuel, blowing any black smoke. Make sure all the setting are correct, float, idle mix, initial timing/total timing. Is the jetting stock or changed from holley factory settings?

I've had 9:1 360 with 484/509 cams run a lot better than 5K with a similar set up and it wasn't any 13 second car. There's a reason it shuts off at 5K and won't pull.