Explain this.

Price wise, roller rockers aren't for everyone, but I still think it's a worthy upgrade over stock stamped. The Eddy's would probably appreciate the extra lift of the 1.6 being how your cam is in the .490" lift range. I think the real issue with durability is, just making sure the setup is correct.....meaning proper length push rods for a clean valve sweep and checking pushrod clearance thru the head.