Stock LS1 with 317's
 

What would the compression ratio be on that setup? unmilled of course. what is the optimum compression for a stock bottom half and building a truck mani. setup?

Also know a guy that has a set of 317's but were m illed 40 thousandth's would that b too much?

Unmilled it takes the comp. ratio to 9.5.1, the miled ones i think would be not much diffrence over stock 853.3. It maybe drop u to 10.1to1 eagle has a calculator on there website for this.