I have a 10.5 to 1 440 with a purple shaft .557, and I'm using the stock Mopar ductile iron adjustables, (probably sixty years old).
If I were you.... prw stainless, or the new 440 source ductile irons. Rollers are not really necessary for .540 lift.. If crane or isky ductiles were still available new, either would be my 100% recommendation
I figured I’d go with rollers as I am going to be using a hydraulic roller can. Sorry I just realized I missed that in my original post. Want as an effective valve train as I can. I am leaning towards both options you mentioned
