does anyone make high compression pistons for a 170

ok guys thanks for the info.. ok if i use the stock pistons which i believe for 69 was 8.5 comp... i got a cam pickout at cliffords to put in this engine my question will the pistons need to be notched for this cam specs below
Mechanical cam package
.498” 280 / 290 246 / 256 to ROUGH IDLE. 2,500 to 5,000 VALVE LASH (.024” Int / .026” ex.