One of my Chevy buddies with a strong running 454 gave me the heads up on Engle in the 70s.
I have been using them since then and am very happy with the performace and customer service.
They were the supplier to Hughes until a couple of years ago.
Their original designs used the agressive ramps that Mopar engines can use with the larger diameter lifters..
I believe they supplied a lot of the early Hemi Fuel Dragster cams as well.