So I did a valve adjustment, and yes I double checked it, and now I get a "whistle" every once in a while when I give the car heavy throttle at above 4k and up. The whistle kind of sounds mechanical (metal rubbing high speeds) so wondering if could be bent valve? Side note bought as one owner car about 10k ago, now ~76k and had to adjust all valves but 3, way to tight. Any thoughts would be great, and I don't think vacuum line because I don't hear at normal driving.

 

If it was a vacuum leak, your idle would be bouncing up and down. Do you have an aftermarket intake?

 

Nope, all stock, and idle is perfect