I'm looking into using 5.3 gm valves in my 350 and i can't find the length of the 350 valves, so its hard to make a comparison. reasons for 5.3 valves 1)MIGHT be cheaper then stage 1's and lighter 2)thinner, allows more flow 3)ls series beehive springs 4) bronze guides are cheap (for me) 5) 1.89 in, 1.57 ex. stock size for 5.3 (bore is 96mm = 3.78 in) anyone know what length 350 valves are? i searched but didn't find anything useful.
