Once you have all the bolts started, lightly snug them up. Starting from the center, work outward in a crisscross pattern. Then go back and torque the bolts in the same manor to 30-35 lbs. Never over tighten.
I torque to 20-25, then go back over again, to 30-35. I also spray the bolts with WD40 before installing them.
Start the motor and run till it reaches its normal operating temp, then shut down. Once its cooled down, re-torque the bolts once more. If your using the Breslin bolts, don't tighten the set screw until this step is competed.
Go back and re-torque the bolts once more after a few days have passed (or cycles running up to operating temp and cool down).