before you put the plugs in make sure you replace your heads with 99+ PI heads. and also some never-seize on the plug threads if you have copper plugs - > this will maximize your performance allowing you to get the best bang for your spark, and eliminate troublesome removal of your plugs in the future.
never-seize/anti-seize everything!! LOL!!
Gap them @ .54 for N/A, .35 for a power adder - is the rule of thumb I always follow.