If you use the CompCams #828-16 solid-body roller lifters, you do NOT need to do any mods. With 1.6 ratio Harland Sharp rockers I'll have right at .600 lift.(.563 with 1.5) This is the same exact cam and lifters I had running in it with the stock crank. The lifter valley did, however, need to be clearanced for the link-bars to clear. The lifters use captured link-bars.

In this pic of my stroker buildup, you can see a little of where I had to grind for them to clear. (it looks like more than it is)