Quote:

the .509 is a larger cam then the .528 solid. I like the .528 but I still think a more modern grind can be better depending on the package.



I agree but the engine I am going to try it on is for someone that doesn't need the fear of using a cam ground to take advantage of the .904 lifter. I have an Engle KV-1 that I think is similar to the .528 that I want to put in a stockish 383 to see how it runs , I had it ground up for a 432 F.A.S.T. stroker and had the lobe sep spread to 112 to bring up the idle vac, but I need to put that in something with bushed lifter bores ...