I just say this because I did have two or three that wouldn't hold tight. And I went ahead and got the the aftermarket Adjusters. On my duster with the stroker I had at least a 585 lift that scene 7000 RPMs regularly. No problems. My wife 66 Barracuda had a couple that would back off occasionally and cause a rattle. I just go in there and take them down again but I ended up selling the car as we have a 41 Studebaker we want to restore instead. I just had a couple like I was saying that work great but I had issues with them backing off. I would say if it's a full-out race or we'll see the track I would definitely think about spending the $78 for the hold Downs. if it's a streetcar that's not going to see over two or three grand regularly you'll probably catch the rattling and Ticking before it does anything major. The once they start losing their bind and someone's adjusting them back and forth too much they will eventually work there were a loose...
