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If you have open chamber heads, the 107s are a great choice. if your deck height has been shaved and they end up at "zero deck" and gives you more compression than you want, then you can take those 107s and have some, all, half, etc. of the dome shaved off.

you can do it to create a quench pad by only milling on half the piston, you could mill evenly off the whole top, etc.

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The 107 don't have any dome.

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Dang it! I keep doingthat!!!

Mixing up the 107s and the 190s!




He said he was worried about them making his compression too high, which put in my head, the domed pistons.


if he's using open chamber heads, the 107s are going to be VERY low compression. I used them on a edelbrock headed, stock stroke 360, and compression there was 10.7:1 an open chamber head would drop those down to probably 9.0:1 or less.