Another piston option for the 273.

408 swinger said

That's right. Forgot about the width, but, then again "while you're in there". Lol. Doing this on a 360 right now. Also doing a 318 with the scat 360 stroke/ 318 main crank. The 1.74 compression distance piston stuck out .037. With the Magnum head gasket, piston to head clearance was a little tight. Guy got scared and milled a few thousand off the top.

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Best to keep 40th on the quench area so zero deck 40th head gasket perfect.
On my heads only a real small quench area.
Considering removing it all together, create a kind of hemi chamber, push the piston up into the chamber to get the 10's. Those race pistons are 12mm thick on the face some heavy machining is possible. I'm considering a very shallow taper from the edge to the crown following the shape of the chamber,

the valve pocket can go right in 8mm. That leaves 3/16" under the pocket. Just need to make sure the top ring is about 1/4 below the deck.