I saw an ad in which a guy is selling a 49ish ford with a flatty. It said that is has adjustable lifters from a company called Johnson which has a screw type adjuster on it to set the valve clearences.

Has anyone ever heard of this?

I am confused because I thought the flattys don't have lifters, the valve stems rest right along the cam.

Now I could understand if the valves had a screw to adjust the overall length.


Chris