I have been pondering this exact thing for a few days now, only for a big block. I may just spray weld the chambers then mill them to create a closed chamber 906 or what ever. Just changing pistons will not gain the desired quench you get from a closed chamber. I'm thinking my pistons are too far in the hole for good quench anyway, but I could gain a little in compression, which the cam may drain off anyway. And so goes the vicious cycle with it's myriad of variables. I shall persevere and overcome, or I will just build a 280hp 440 that will run forever. Skinny tires should get me the smoke I desire.
