13:1 Compression Stock Stroke 400??

72DMag said

Is there anyway to get a stock stroke 3.375" mopar 400 big block into the 12:1 to 13:1 compression ratio using 75 cc heads? I looked into the KB240 pistons but even with a 75 cc cylinder head ratio will only be at 10:1 compression?

Maybe there is a combo available using the longer 6.965 hemi rods?

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I have some (rare) Direct Connection TRW domes for a 400. They are basically just a huge (4.402" +.060" over) bore L2293F dome with fire slot and trough valve relief, with floating 1.094" pins. To get 13:1 with that short stroke, the block would still need milling to zero and possibly some additional head milling to compensate for the reduced dome volume once real valve reliefs were cut. The last time I used L2293Fs in a 383 +.060", it took some pretty deep reliefs to clear a moderate solid flat tappet cam (270ish duration, less than .580" lift). A longer crank may be your best bet if you have to have 13:1!