Jul 12, 2011 #1 6 6.5dieselman Full Access Member Joined Oct 7, 2008 Posts 428 Reaction score 1 Location Walton Ky i'm looking to install a cam in my 1991 D150 that i'm putting a 360 in, how big of a lift can i go before i have to replace the valve springs?
i'm looking to install a cam in my 1991 D150 that i'm putting a 360 in, how big of a lift can i go before i have to replace the valve springs?