R rustypee New Member Sep 5, 2008 2 0 0 Sep 5, 2008 #1 Sep 5, 2008 #1 Swapping Cobra F3ZE-AA heads onto a 289. Measured the valve stem to seat distance and the F3ZE valve stem is .200" taller than C5AE valve stem. Do I need to use pushrods that are .200" taller than stock or will stock pushrods still work properly?
Swapping Cobra F3ZE-AA heads onto a 289. Measured the valve stem to seat distance and the F3ZE valve stem is .200" taller than C5AE valve stem. Do I need to use pushrods that are .200" taller than stock or will stock pushrods still work properly?