The Mopr.528 will make 30-40HP over the XE274H. I run one in my 440 now. You can run stock rockers with the XE274H. I have run two motors with the XE275HL with no problems. .525 lift 231-237 @.050
Thank you. Glad to know some has used that setup with success. I've heard the XE275HL is a Mopar specific grind while the xe274 is a chevy grind, would you say the xe275 is the better of the two?