How can i make my m1 garand look like this?

ive got some old unmarked m1 stock that i would not mind cutting down to make it like this...or just any type of modified stock at all i saw a man who had added a raised cheek rest. or maybe cut the stock down down 3 inches or so and make it look unique...ps i would never ddo this to a us gi marked stock this is and old stock with no markings worth less than 40 bucks