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  1. S

    906 valve lift? And pistons

    What's the most lift I can get out of my 906 heads? Will changing springs help any and what else can I do? Wanting to run a piston with a good valve relief. Trying to keep it between 10 and 10.5:1. I brought the heads to work, I'm going to cc all the chambers later once it's cleaned up. I've...
  2. S

    Best heads for a budget 440?

    I've done some searching and no clear answers yet. I have a '70 Charger, going to be a stick car. I picked up a 84k mile 440 6 pack short block for $1000. I can establish that. I'm not sure what the best top end for it would be? I want to go with a 6 pack but I'm not sure. I tracked down a 6p...
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