318 driver - cam change or not?

Yes. I have used the cam I recommended in a 318 with Edelbrock Performer, Holley 600 and headers. I like it. Of course the resident guru shut it down so surely it was a dog.
Used that cam a bunch in different engines/makes and it works!. I just like to "fudge" a little more with the new cams but if I had the grind you mention on the shelf it would go in.