I'm running the XE275HL in my 360. .525 lift on both sides, but not a wild duration (231/237 @ .050).
Streetable all day long, not an issue at all. I believe the HL series also takes advantage of the wider lobe area that the mopar smallblocks offer, allowing for better life on the street with a higher lift. Can't remember now though. Love it. Motor pulls HARD!