JeremyNH
I'm Awesome
Vortec heads bind up at about .480 lift with springs at the stock height. To get around that you need to either have the heads machined for added clearance from the stock retainer to the valve seal or switch to a retainer that sits higher on the valve stem. For the no machining case you need LS1 springs, retainers (Comp 787-16), and locks (Comp 623-16). That combination is good to about 0.530 of lift. Those Comp retainers only work with beehive springs.Well I upgraded springs and changed the cam like I was told to never new I needed the retainers for clearance so your saying if I change the retainers I’m not having no more bended pushrods ?