340 cam for 318

If you're fortunate enough to have a block that will handle a 4.00 inch bore, JE has a piston with a 1.79 inch compression height.
JE Pistons 345794
https://www.jepistons.com/product/s...bUMQKymfzCJr0J0alPsaW1-HhMNDTHwJw-EfgV8AXQY1m