Even with a positive deck height piston stay FAR away from the Ede 340 head. Ask guys like, RAMM, Brian at IMM, MRL, IQ how they would do it. I doubt any of them would choose the open chamber over a closed chamber with a zero deck or slight positive deck piston set up. Only time to take an open chamber is if the piston is so far below deck that achieving quench is not possible. Pick your parts, pay your money.
