Hey guys, I'm getting ready to change the valve seals on my 88 k2500 350. I've read and watched tutorials on the process. My question is, can it be done without an air compressor or the rope trick? I'm thinking of bringing cylinder to tdc to hold valves and clamping the serp belt on both sides of a pulley. To keep it from moving. You think this will work? I tried doing a search on here and didn't find anything.