Acceleration noise?

The car sat for a little over a year. No clue if it was making this noise before that.

i was doing some WOT pulls to clear out cobwebs after I had put fresh oil in and ran a full tank of gas through, the car seemed a little unresponsive. Had a friend suggest that it may just need to be opened up and ran a little to clear the cobwebs, break some things loose.

That's when I noticed When I take off, if I just roll into the throttle and let the motor slowly build rpms, the whine is sort of there but barely noticeable. If I floorboard throttle, around 3-3500 rpms I start to get a whine that starts, then stays until throttle is let out.
Doesn't do it at lower rpms. Doesn't do it unless hard acceleration. It doesn't sound like a transmission whine. It's almost a mixture of a whine and a squeal. Doesn't just sound like intake suction either.

any ideas on where to start/how to diagnose this?