The question has been answered.

One of the 3 flat top pistons I listed, deck block/mill heads/gasket thickness to arrive at 10:1...... done.

If you don’t want to mill anything....... you’ll need to have custom pistons made.

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads