cam rpm range on stroker

Thanks guys so far it seems tough to get a cam recommendation from the email route filling out their somewhat detailed request form.I did get one from hughes
HUG STL6064AS-8

SB SLD FLAT TAPPET CAM 260/264 -108ÂșLSA

.410"/.414" LOBE LIFT
seems to be in the area thats being recommended here but then I see this comp cam that I was 1st looking at 20-633-5
260/266 @.050 but the lift is .558/.555 what kind of difference is that lift making,the heads will kinda peter out at around .550 lift does the "extra" lift still help?


Get all the lift your valve gear can take. I can make your head Peter out at .300 lift if I want to.

I just don't get why they all want that extra exhaust duration. Split pattern cams should be almost like a dodo bird. Almost extinct.