Prostock is the pinnacle of drag race pushrod technology. Walk through the pits and watch a PS team run over the valves for lash, and spring tension. I've never once seen a team look for crank position. Good enough for them, good enough for me.
The cam cores they use i am sure are much less prone to flex like the junk i run. Plus those guys do it for a living and are qyite practuced i am sure.
