New to the forum and need some advice. I'm having my 67 400 335 hp engine rebuilt. I want to lower the compression (around 9.2-9.5)to run pump gas. I'm putting in the h.o. "068" cam will be installing the factory h.o. exhaust manifolds w/2.25 pipes. I have read other post about the 8 eyebrow pistons available and looks like these should not be used. Can anyone recommend the best piston to use? Any other comments or recommendations is most appreciated. This is a TH400 auto, A/C, power brake car with 2.93 non-posi rear. Just want a good pump gas motor with with the h.0. upgrade.